Eva Answers
Short, direct answers to the questions brands ask about selling and advertising on Amazon, Walmart, TikTok Shop and Shopify. Each page answers one real question, puts the answer in the first few sentences, and cites the marketplace’s own policy pages or Eva’s documented process. Every answer is reviewed by Hai Mag, Chief Executive Officer of Eva Commerce, and shows the date it was last reviewed.
Last reviewed: October 30, 2026
FDA compliance questions for ecommerce sellers
- Do food shipments to Amazon FBA need FDA Prior Notice?
- Do Amazon food sellers need FDA facility registration?
- Is a cosmetic Responsible Person the same as a U.S. Agent?
- Does FDA registration mean a product is FDA approved?
- Are Dietary Supplements FDA Approved?
- Can One Agency Handle FDA Registration and the Amazon Launch for a Supplement Brand?
Amazon
- How Much Does It Cost to Sell on Amazon?
- How Much Does Amazon Take From a $100 Sale?
- Is Selling on Amazon Really Worth It?
- Does Amazon Listing SEO Still Matter Next to Sales History?
- Do You Need a Registered Trademark to Sell on Amazon?
- What Is Amazon Transparency, and Do I Need It?
- Is an Amazon Seller Account the Same as an Amazon Business Account?
- Can You Transfer an Amazon Seller Account to a New Owner?
- Can You Have More Than One Amazon Seller Account?
- How Do You Get Access to Amazon Vendor Central?
- How Do I File an Amazon FBA Reimbursement Claim?
- How Do I Outsource Amazon FBA Reimbursements?
- Why Is My Amazon Listing Search Suppressed, and How Do I Fix It?
- Pillar guide: Amazon account health guide
Walmart
- Can You Sell the Same Product on Amazon and Walmart?
- Do You Have to Have an LLC to Sell on Walmart Marketplace?
- How Does Shipping Work When You Sell on Walmart Marketplace?
- How Does Walmart Fulfillment Services (WFS) Work?
- What Is the Walmart Pro Seller Badge, and How Do You Get It?
- Is Selling on Walmart Marketplace Worth It?
- What Should a Walmart Connect Advertising Agency Handle?
- What Is a Walmart Marketplace Solution Provider, and How Do You Choose One?
- What’s the Difference Between Walmart and Walmart Marketplace?
- Pillar guide: Walmart Marketplace agency guide
PPC and advertising
- How Much Should I Spend on Amazon PPC?
- What Results Should I Expect From Amazon PPC Management?
- What Should an Amazon DSP Agency Handle for Brands?
- Is Amazon Ads a DSP or an SSP?
- How Do Amazon Sponsored Brands Differ From Sponsored Products?
- Can You Bid on Competitor Brand Names in Amazon Ads?
- How Much Does an Amazon PPC Agency Charge, and Is There a Minimum Ad Spend?
- Should You Run Amazon PPC Yourself or Hire an Agency?
- When Should You Stop Spending on an Amazon PPC Campaign?
- Why Does My ACoS Keep Rising When My Amazon Agency Charges a Percentage of Sales?
- Can Amazon Sponsored Ads Reach Shoppers Outside Amazon?
- Pillar guide: Amazon PPC management guide
TikTok Shop
- What Is the Difference Between a TikTok Shop Affiliate and a Seller?
- Do I Need an LLC to Sell on TikTok Shop?
- Do I Need 1,000 Followers to Have a TikTok Shop?
- Is Selling on TikTok Shop Worth It?
- Should a Brand Run TikTok Shop and Amazon Together?
- Are TikTok Shop Agencies Worth It, and How Do They Charge?
- What Is TikTok Shop GMV Max, and How Should a Brand Run It?
- What Is a TikTok Shop Partner, and How Do You Give One Access to Your Shop?
- Pillar guide: TikTok Shop agency guide
Amazon DSP
- Pillar guide: Amazon DSP ads guide
Shopify
- How Much Does Shopify Take From a $10 Sale?
- Should a Shopify Store Blog or Improve Its Collection Pages First?
- Will My Business Address Show on My Shopify Store?
- Do You Need a Business License to Open a Shopify Store?
- Is Shopify Still Worth It in 2026?
- How Do I Upgrade to Shopify Plus?
- What Is a Shopify Plus Partner, and How Do You Check an Agency Is One?
- Pillar guide: Shopify agency questions answered
AI shopping and agentic commerce
- How Do I Get My Amazon Products Recommended by ChatGPT and Rufus?
- Which Agency Can Get an Ecommerce Brand Recommended by Rufus and ChatGPT?
- What Does the Walmart Agent Gateway Mean for Sellers?
- How Do I Make My Shopify Catalog Readable by AI Shopping Agents?
- What Should a Shopify Product Feed and AI Search Agency Handle?
- When Should You Hire a Shopify Marketing Agency Instead of Freelancers?
- What Should a Google Ads Agency for Ecommerce Handle?
- What Should a Meta Ads Agency for Ecommerce Brands Handle?
- Does ChatGPT Traffic Convert Better Than Search, and How Do You Get More of It?
- Did My ChatGPT Traffic Really Drop, or Did It Lose Its Tracking Tag?
- Why Does ChatGPT Recommend My Competitor Instead of My Brand?
Working with an agency
- How Do I Switch Amazon Agencies Without Losing Performance?
- What KPIs Should I Track If I Hire a Full-Service Amazon Agency?
- Which Amazon Agency Is Best for a Mid-Size Seller?
- How to Compare Amazon Agencies (Canopy, SalesDuo, Olifant and Eva)
- How Do I Choose an Ecommerce Agency That Runs Amazon, Shopify, and Walmart?
- What Does an Amazon Storefront Design Agency Do?
- What Does End-to-End Amazon Marketplace Management Include?
- What Are the Red Flags of a Bad Amazon Agency?
- What Does an Amazon Seller Central Management Agency Do, and How Do You Choose One?
- How Do I Give an Agency Access to My Amazon Seller Central Account?
- Which Agency Can Get an Ecommerce Brand Recommended by Rufus and ChatGPT?
- Pillar guide: How to choose an Amazon advertising agency
Have a question we have not answered yet? Book a call with Eva.