What Does an E-Commerce Agency Actually Do? (Honest Answer)

By GigaCommerce
on March 24, 2026

The Daily Work: What an Agency Actually Does

For Amazon Management

A typical week of Amazon management for a single brand:

Monday (2-3 hours):

Pull and review weekend performance data (sales, ACoS, organic ranking changes)
Process search term report: negate non-converting terms, flag promising new terms
Check inventory levels: any products approaching stockout?
Review competitor activity: any price changes, new listings, or ad shifts?

Tuesday (2-3 hours):

PPC bid adjustments based on last 7-14 days of data
Launch or adjust Sponsored Brands campaigns
Review and respond to new customer questions (Q&A section)
Draft negative review responses for any new 1-3 star reviews

Wednesday (2-3 hours):

Content work: listing optimization for 1-2 products (title, bullets, or backend keyword updates)
A+ Content creation or refinement for priority ASINs
Photography direction if new images are needed
Prepare weekly performance report

Thursday (1-2 hours):

Strategy call with client: review performance, discuss priorities, align on next steps
Update campaign structure based on strategy decisions
Submit any listing changes through Seller Central

Friday (1-2 hours):

Review the week’s search term data (end-of-week snapshot)
Plan next week’s priorities based on performance trends
Submit any pending A+ Content for Amazon review
Check account health dashboard for any compliance issues

Total weekly effort per client: 8-13 hours. This is the level of attention an agency provides on a $5,000/month Growth plan. A Launch plan ($2,000/month) involves less frequent optimization — bi-weekly instead of weekly on some activities. A Scale plan ($12,000/month) adds daily optimization, DSP management, AMC analysis, and deeper strategic planning.

For Shopify Management

A typical month of Shopify store management:

Week 1: Speed audit and optimization pass. Install any pending theme or app updates. Review heatmaps and session recordings from Microsoft Clarity. Identify the month’s A/B test hypothesis.

Week 2: Set up and launch A/B test (product page layout, CTA button, pricing presentation, or checkout flow change). Create 1-2 new landing pages for upcoming campaigns or seasonal promotions. Review and optimize email flows in Klaviyo.

Week 3: Analyze A/B test results (if sufficient data). Implement winning variant permanently. Review SEO performance in Google Search Console. Create or update blog content targeting priority keywords. Internal linking audit and updates.

Week 4: Monthly performance report. UX audit identifying friction points. Plan next month’s testing and content calendar. Strategy call with client. Implement any client-requested changes or new features.

For Performance Marketing (Paid Ads)

A typical week managing Google + Meta advertising:

Daily (30-60 minutes):

Monitor campaign delivery (budget pacing, any anomalies)
Check for ad disapprovals or account issues
Review conversion data and flag significant changes

Weekly (3-4 hours):

Creative performance review: which ads are winning? Which are fatiguing?
Audience performance review: which segments are converting?
Budget reallocation based on performance (shift spend from underperformers to winners)
Launch new creative tests (2-3 new variations per week)
Competitor ad monitoring (what are competitors running?)

Monthly (2-3 hours):

Full account restructuring review (campaign organization, targeting logic)
Landing page performance analysis (are Shopify product pages converting ad traffic well?)
Creative strategy planning for next month
Performance report with insights and recommendations

What You’re Really Paying For

Expertise You Don’t Have

Amazon PPC is a specialized discipline. Shopify CRO requires specific technical and analytical skills. Meta advertising requires creative strategy and audience understanding that takes years to develop. An agency brings this expertise from Day 1 — you don’t need to spend 6 months learning what works.

More importantly, agencies have pattern recognition from managing multiple accounts. When your PPC specialist has optimized 50+ Amazon accounts, they know: which campaign structures work in which categories, which bid strategies produce results at which spend levels, and which listing approaches convert for which product types. This cross-account learning is impossible to replicate as a single-brand operator.

Tools You’d Have to License Yourself

Agencies use specialized tools that are cost-prohibitive for individual brands: keyword research tools ($100-$300/month), competitive intelligence platforms ($100-$500/month), analytics and reporting tools ($50-$200/month), AI optimization tools (proprietary), and design/content creation tools ($50-$200/month). At $300-$1,200/month in tool costs, having an agency amortize these across clients is more efficient than licensing them yourself.

Time You Don’t Have

The work described above represents 30-50 hours/month per brand across Amazon + Shopify + advertising. If you’re the founder, that’s 30-50 hours you’re NOT spending on: product development, supplier relationships, team management, financial planning, and strategic vision. The opportunity cost of your time is almost always higher than the agency fee.

Accountability You Can’t Self-Provide

It’s remarkably easy to neglect your own PPC account. Life gets busy. You skip the search term review for 2 weeks. Then 4 weeks. Suddenly you’ve wasted $3,000 on non-converting terms. An agency provides external accountability — the work gets done on schedule because there’s a team dedicated to it, with processes and checklists that ensure nothing falls through the cracks.

What an Agency Does NOT Do

For transparency, here’s what falls outside typical agency scope:

Product development. An agency can analyze market data, competitive gaps, and customer feedback to inform product decisions — but the actual product creation, manufacturing, and supply chain management is your responsibility.

Financial management. Agencies report on revenue and advertising metrics, but they don’t manage your accounting, tax compliance, or financial planning.

Legal and compliance. Trademark filing, regulatory compliance (FDA, CPSIA), and legal disputes are your responsibility — though an agency can guide you to the right resources.

Inventory management decisions. An agency can flag low inventory and recommend reorder timing, but the purchase orders, supplier relationships, and cash flow decisions are yours.

Customer service (for your Shopify store). Amazon FBA handles customer service for Amazon orders. For Shopify, managing customer inquiries, returns, and complaints is typically your responsibility (or your customer service team/tool’s).

How to Know If an Agency Is Actually Doing the Work

What Good Agency Communication Looks Like

Weekly/bi-weekly reports that include: specific metrics (not just charts), what changed and why, what actions were taken (search terms negated, bids adjusted, content updated), what’s planned next, and any issues or risks flagged.

Proactive communication. A good agency reaches out before you have to ask: “Your top product is trending down in organic rank this week — here’s what we’re doing about it.” A mediocre agency waits for you to notice and ask.

Real-time dashboards. You should be able to check performance anytime, not just when the agency sends a report. If the agency doesn’t offer a dashboard, ask why.

Warning Signs the Agency Isn’t Working

Generic reports with no insights. “ACoS was 26% this month” is data. “ACoS improved from 30% to 26% because we negated 140 non-converting search terms and shifted $800 from broad match to exact match” is insight. If your reports read like automated data dumps, the human layer is missing.

No proactive recommendations. If the agency only does what you ask — never bringing ideas, never flagging opportunities, never suggesting tests — they’re order-takers, not strategists.

Declining performance with no explanation. Revenue dropping, ACoS rising, organic ranking falling — and the agency hasn’t mentioned it until you asked. This indicates they’re either not monitoring closely enough or avoiding difficult conversations.

Difficulty reaching your account manager. If emails go unanswered for 48+ hours and calls aren’t returned, the account is being neglected.

The Agency ROI Framework

How to Calculate Whether an Agency Is Worth It

Step 1: Establish a pre-agency baseline. What was your monthly revenue, ACoS, TACoS, and organic ranking before the agency started? Record these numbers.

Step 2: After 90 days, compare against the baseline. Revenue increase attributable to agency work? ACoS improvement? New keywords ranking? Listing conversion rate improvement?

Step 3: Calculate ROI.


Agency ROI = (Revenue improvement per month - Agency fee per month) ÷ Agency fee per month × 100

Example: Pre-agency revenue: $30,000/month. After 90 days: $42,000/month. Revenue increase: $12,000/month. Agency fee: $5,000/month. ROI = ($12,000 – $5,000) ÷ $5,000 × 100 = 140%.

A 140% ROI means every dollar spent on the agency generates $2.40 in net value. Most well-managed agency engagements produce 100-300% ROI within 6 months.

When an Agency Isn’t Worth It

If revenue doesn’t improve after 90 days (with proper execution, not just the agency’s first month of onboarding), question the value.

If the agency fee exceeds 15% of your total revenue for an extended period, the economics may not work — unless you’re in a high-growth phase where the investment is justified by trajectory.

If you could do the same work yourself in less time than the agency fee represents at your hourly rate. For most founders, this is unlikely (30-50 hours/month of specialized work is worth more than $5,000 in opportunity cost) — but for hands-on operators with PPC expertise and available time, DIY can be viable.

The Agency Engagement Lifecycle

Phase 1: Onboarding (Week 1-2)

The agency audits your current setup, gains account access, reviews historical performance, and develops a strategy. Expect: audit findings, proposed KPIs, a 90-day plan, and the first operational changes.

Phase 2: Foundation Building (Month 1-3)

The agency implements structural changes: campaign restructuring, listing optimization, content creation, and initial testing. This is the “heavy lifting” phase where the most significant changes happen. Performance may fluctuate as changes take effect.

Phase 3: Optimization (Month 4-8)

With the foundation in place, the focus shifts to continuous optimization: refining what works, cutting what doesn’t, expanding keywords, testing creative, and building organic momentum. Performance should show consistent month-over-month improvement.

Phase 4: Scaling and Maintenance (Month 9+)

The account reaches maturity. Major structural work is complete. The focus shifts to: maintaining performance, defending against competitor moves, expanding into new products or channels, and extracting incremental improvements through testing. This is the steady-state — and where the relationship either evolves (adding channels, deeper strategy) or becomes maintenance-only.

Frequently Asked Questions

Do I need an agency if I’m just starting on Amazon?

Not necessarily — but it depends on your time and expertise. A brand-new seller with 1-3 products can learn Amazon management through resources like this blog and free tools. An agency makes sense when: you’re launching 5+ products simultaneously, you want to accelerate from zero to profitability faster than self-learning allows, or your time is better spent on product and sourcing while experts handle the marketplace operations.

What’s the difference between an agency and a freelancer?

Freelancer: One person doing multiple roles. Lower cost ($1,000-$3,000/month). Limited bandwidth. No backup if they’re unavailable. Expertise in 1-2 areas (usually PPC or content, rarely both).

Agency: A team with specialized roles. Higher cost ($2,000-$15,000/month). More bandwidth and consistency. Backup coverage if a team member is absent. Expertise across PPC, content, strategy, and analytics. Cross-account learning from managing multiple brands.

How do I switch agencies without disrupting performance?

Plan a 2-4 week overlap: the old agency continues managing while the new agency audits and prepares. Request full data export from the old agency (campaign data, keyword research, content assets, performance history). Brief the new agency on what’s worked and what hasn’t. Have the new agency take over campaign management on a Monday (start of a fresh data week). Monitor closely for the first 30 days post-transition.

Can an agency guarantee results?

No reputable agency guarantees specific revenue or ranking outcomes. They can guarantee: consistent execution cadence, transparent reporting, responsive communication, and strategic recommendations. The results depend on: product quality, pricing competitiveness, market dynamics, and how well the brand and agency collaborate. What an agency CAN promise: specific KPIs to aim for, a defined process, and accountability for execution.

What should I prepare before hiring an agency?

Seller Central access credentials (set up user permissions, don’t share passwords). Current performance baseline (last 6 months of revenue, ACoS, organic ranking data). Clear goals (revenue target, ACoS target, timeline). Budget defined (both agency fee and advertising spend). Products you want to focus on (if your catalog is large, define priority SKUs). Brand guidelines (if you have them — logo, voice, visual standards).

Next Steps

Want to see what an agency can do for your brand? Our free audit demonstrates the depth of analysis we provide — no commitment required. We’ll identify specific opportunities and estimate the impact of professional management on your specific account. Get your free audit →

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Last Updated: March 2026