Paid Traffic in E-commerce: A Practical Playbook

Paid traffic is every visitor you buy: marketplace ads, social ads, search and shopping ads. You trade money for speed and control, and the traffic stops the day the budget stops.

This guide covers the numbers to know before you spend, then each ad channel, how to test and scale, and a 30-day starter plan.

When paid traffic is worth it

Pay for traffic when three things are true: the product already sells without ads, your margin can absorb the ad cost, and you can track which ad brought which order. Ads amplify what works, but they rarely fix a weak product, listing or price.

The best setup uses both. Free traffic helps you find winning products and content cheaply, and paid traffic scales the winners faster.

Know your numbers before you spend

The one number to know before launching any ad is your break-even ROAS (return on ad spend): the revenue each $1 of ads must bring in for you not to lose money on the order.

Break-even ROAS = 1 ÷ gross margin

Here, gross margin means your margin before ad costs. For example, a product sells for $30 and costs $18 all-in (product, packaging, shipping and platform fees). Your margin is $12, or 40%, so break-even ROAS is 1 ÷ 0.40 = 2.5. Below 2.5 you lose money on the first order, and above it you make a profit.

Metric	What it tells you	Formula	In this example
ROAS	Revenue per $1 of ad spend	Ad revenue ÷ ad spend	Break-even at 2.5
CPA	Cost to win one order	Ad spend ÷ orders	Depends on your ads
Max CPA	Most you can pay per order and break even	Price × margin %	$30 × 40% = $12
AOV	Average order value	Revenue ÷ orders	$30 if each order is one item
LTV	Gross profit from a customer over time	AOV × margin % × orders per customer	$24 if they order twice

Tip: if customers buy again, you can accept a first-order ROAS below break-even, as long as LTV covers it. Know your repeat rate before you make that bet.

Structure: a full funnel, not a single ad

Most ad money usually goes to finding new buyers, with smaller budgets to bring back people who already know you.

Retargeting and retention audiences are small but usually convert better, because these people already know you. Exclude past buyers from prospecting so you don't pay twice to reach them.

Marketplace ads: Amazon, eBay, Shopee, Lazada, TikTok Shop

Marketplace ads reach buyers who are already searching, so they are often the safest first paid channel. If you're new to these platforms, start with our guides to selling on Amazon and selling on eBay.

Tips

• Fix the listing before boosting it. Ads magnify your conversion rate, good or bad, so get the title, first image, price and reviews right first.
• Start with automatic or broad targeting. Let the platform find which keywords convert for 1–2 weeks, then move winners into manual campaigns.
• Bid on long-tail keywords. Specific phrases ("women's hooded sun protection jacket") often cost less and convert better than broad ones.
• Add negative keywords. Cut searches that bring clicks but never orders.
• Advertise your best sellers, not your slow stock. Products with proven conversion and good reviews usually give the best return.
• Defend your brand name. Bid on your own shop and brand terms so competitors don't take those buyers.
• Boost during campaigns. Consider raising budgets on big sale days such as 11.11 and 12.12, when more people are ready to buy. Clicks can cost more then, so keep watching your break-even ROAS.

Trick: on some marketplaces, sales from ads may also help your organic ranking, so a short paid push can give a new product a start. Platforms don't promise this, so judge the push on profit.

eBay Promoted Listings

eBay renamed its campaign types in 2025: Standard became General, and Advanced became Priority (Vendoo). Its three ad types each suit a different job.

Ad type	You pay	Best for
General	A % ad rate on the sale total, only when a promoted item sells	Most listings, long-tail inventory, low-risk testing
Priority	Per click, with a daily budget	Best sellers and competitive categories
Promoted Offsite	Per click	Reaching buyers outside eBay, on external channels such as Google

• Start with General. You spend nothing without a sale, which makes it the safe default. You can choose a dynamic rate that follows eBay's suggestion or a fixed rate you control. The rate applies to the sale total, including shipping and taxes, so include it in your margin.
• Add Priority for proven winners. It offers smart targeting or manual keywords with match types, negative keywords and ad groups. Since January 13, 2026, only Priority ads can take the first ad slot in search on ebay.com and ebay.ca. Other eBay sites may differ.
• Watch attribution. On the main eBay sites, General fees now apply when a promoted item sells within 30 days of a click, even if the buyer isn't the person who clicked. More sales therefore count as ad-driven, so check your true ad fee as a % of revenue.
• Check eligibility. Priority generally requires Above Standard or Top Rated seller status, and availability varies by eBay site.
• Sell cross-border. eBay's global buyer base suits exporters: list on the sites of your target countries and price shipping clearly.

eBay's rules as read in November 2026. They change often, so confirm the details in Seller Hub.

Social ads: Meta (Facebook, Instagram) and TikTok

Social ads create demand: they reach people who weren't searching yet, so creative often matters more than detailed targeting.

Tips

• Install tracking first. Use the Meta Pixel and Conversions API, or the TikTok Pixel and Events API. Without purchase events, the platform can't learn who buys. Get cookie consent where the law requires it.
• Optimise for purchases, not clicks. Traffic or engagement objectives bring cheap visitors who rarely buy.
• Go broad and let creative target. Ad platforms are often good at finding buyers on their own, and your video does much of the filtering.
• Keep the structure simple. Fewer campaigns with more budget each gather data faster than many tiny ones.
• Use Spark Ads or partnership ads. Promoting your own or a creator's organic post (with their permission) keeps its likes and comments, and usually looks less like an ad.
• Send traffic where it converts. A marketplace listing with reviews or a fast product page beats a slow homepage.
• Refresh creative often. When frequency rises and click-through rate (CTR) drops, the audience is tired. Swap in new hooks before results collapse.

Trick: your best organic videos are often your best ad candidates. Test them as ads first instead of shooting new ones.

Google ads: Search, Shopping, Performance Max

Google captures existing demand and sends it to your own website, which makes it strong for shops with a site and products people actively search for.

Tips

• Clean your product feed. Shopping and Performance Max run on your Merchant Center feed, so you need clear titles with keywords, accurate prices, sharp images and correct stock.
• Start with Shopping or Performance Max for products. Showing the image, price and shop name directly in results helps pre-qualify clicks.
• Use Search for high-intent and brand terms. Think "buy", "price", model names and your own brand.
• Split products by margin. Group high-margin and low-margin items so you can set different ROAS targets.
• Review search terms weekly. Add irrelevant queries as negative keywords.
• Give smart bidding enough data. Target ROAS works best after a steady flow of tracked conversions, so start with Maximize conversions or Maximize conversion value.

Trick: set up product ratings and promotions in Merchant Center. Google says star ratings show only for products with at least 3 reviews, in eligible countries, and promotions are free to add, though you still pay per click. Both can help your ad stand out.

Creative that converts

On social platforms, a better hook can change your results more than a targeting tweak.

Tips

• Hook in the first 2 seconds. Show the result, the problem or a bold claim you can back up before anything else.
• Use proven formats. Try problem and solution, before and after, unboxing, "3 reasons I switched", a real customer testimonial or a founder story.
• Look native. Phone-shot video, people talking to camera and real usage often beat polished studio ads.
• Add captions and on-screen text. Many people watch with the sound off.
• Give a reason to act now. Show the price, free shipping, limited stock or a voucher, as long as it's true, with a clear call to action.
• Make variations, not one-offs. For each winning concept, test 3–5 hooks and 2–3 thumbnails.

Trick: read your reviews and comments for the exact words customers use, and put those words in your hooks and headlines.

Testing and scaling

Paid traffic is a loop: test cheaply, keep only what beats break-even, scale it slowly, and replace it when it tires.

Tips

• Test one variable at a time. Keep the audience and budget the same with different creative, or the same creative with a different offer.
• Give each test enough data. Wait for a meaningful number of clicks and a few days before judging.
• Scale in steps. A common rule of thumb is to raise budgets by 20–30% every few days rather than doubling them, so results stay stable.
• Scale horizontally too. Duplicate a winner into new audiences, placements or platforms.
• Keep a creative pipeline. Always have new variations in testing, so a replacement is ready when the winner tires.

What to watch, and what to do

Signal	Likely cause	Action
Low CTR	Weak hook or image	New creative, new first frame
High CTR, few orders	Landing page, price or offer	Fix the listing, add reviews, test the offer
ROAS falling over time	Creative fatigue	Refresh hooks, rotate formats
High CPA from the start	Wrong product or audience	Pause, test another product or angle
ROAS above break-even, stable	It works	Scale the budget gradually

Common mistakes

• Running ads before knowing the break-even ROAS.
• Boosting a product that doesn't sell without ads.
• Optimising for clicks or likes instead of purchases.
• Judging an ad after one day, or changing settings daily while the platform is still learning.
• Doubling budgets overnight.
• Ignoring returns, cancellations and fees, which make ROAS look better than real profit.
• Never refreshing creative.

A 30-day starter plan

1. Week 1 — Set up. Calculate break-even ROAS per product, install tracking and pick 2–3 proven best sellers.
2. Week 2 — Test. Start marketplace ads on automatic targeting and one social campaign with 3–5 creatives, using small, equal budgets.
3. Week 3 — Cut and keep. Pause losers, move winning keywords to manual and make variations of the winning creatives.
4. Week 4 — Scale carefully. Raise the budget on winners step by step, add retargeting, and review profit after fees and returns.

Feed paid traffic products that already sell and creative that already works, and watch profit, not just ROAS.

Sources

• eBay — General campaign strategy
• eBay — Priority campaign strategy
• eBay — Promoted Offsite
• eBay — Updates to Promoted Listings
• eBay — How eBay Advertising attribution works
• Vendoo — eBay Promoted Listings guide
• Google — What makes up a Shopping ad