Resources / Reference

The TikTok Ads glossary.

Every metric, acronym, and setting you'll encounter in TikTok Ads Manager — explained in plain English. Bookmark it for your first campaign. Come back to it every time the dashboard shows you something new.

TikTok Ads Manager has its own vocabulary, and a lot of it is borrowed from Meta with slightly different meanings. Getting these wrong — especially CPM vs. CPR, or confusing "reach" with "impressions" — leads to misreading your campaign data and making decisions based on noise. This glossary is designed to be the tab you keep open while you're learning.

Campaign-level terms

Campaign objective

The top-level goal you declare when creating a campaign. Options include Traffic (send people to a URL), Conversions (optimise for a specific action like purchase or add-to-cart), App Install, Lead Generation, and others. The objective tells TikTok's algorithm who to show your ad to — choosing "Conversions" when you want purchases is almost always the right call for e-commerce.

Ad group

The middle layer of TikTok's campaign structure, sitting between campaign and individual ads. Budget, schedule, audience targeting, placement, and bid strategy are all set at the ad group level. Most sellers run 1–3 ad groups per campaign, each testing a different audience or bid type.

Learning phase

The period in which TikTok's algorithm is actively finding the best audience for your ads. During learning, performance will be inconsistent — this is normal. The algorithm needs roughly 20–50 conversion events to stabilise. Don't make significant changes to budget, targeting, or creative during learning; it resets the clock.

Delivery and reach metrics

Impressions

The total number of times your ad was displayed, including multiple displays to the same person. If the same user sees your ad three times, that's three impressions.

Reach

The number of unique people who saw your ad at least once. Always lower than or equal to impressions. Reach tells you how many distinct people you're in front of; impressions tells you how many total times your ad ran.

Frequency

Impressions ÷ Reach. If frequency is 1.0, every impression is to a new person. If frequency is 3.5, the average person has seen your ad 3.5 times. High frequency (above 4–5 in a short window) usually signals audience fatigue — your ad is running out of new people to show to.

CPM — Cost Per Mille (thousand impressions)

How much you pay per 1,000 ad impressions. A lower CPM means your ads are reaching more people for the same budget. TikTok's CPMs are typically lower than Meta's, which is one of its primary cost advantages for first-time advertisers. Normal range for e-commerce in the US: $3–$12.

Engagement metrics

CTR — Click-Through Rate

The percentage of people who clicked on your ad after seeing it. Calculated as: (Clicks ÷ Impressions) × 100. A CTR below 1% on TikTok usually means your hook isn't landing. Above 2% is solid. Above 4% is exceptional — and a signal to scale that creative. Note: TikTok shows both "all CTR" (including profile clicks and music clicks) and "in-feed CTR" (clicks on your landing page link) — use the in-feed version for decision-making.

Video view metrics

TikTok tracks views in segments: 2-second views, 6-second views, 25%, 50%, 75%, and 100% watched. The most useful early signal is the 2-second view rate — the percentage of impressions that resulted in at least 2 seconds of watch time. This measures how effectively your first frame stops the scroll. Under 20% suggests a hook problem. Above 35% is strong.

Engagement rate

Total engagements (likes, comments, shares, saves) ÷ impressions. High organic engagement on a paid ad is a positive signal — it means real viewers are connecting with the content, which can also help organic distribution of the post.

Conversion metrics

Conversion

A specific action taken on your website after someone clicks your ad — defined by you via the TikTok Pixel. Common e-commerce conversion events: ViewContent, AddToCart, InitiateCheckout, CompletePayment. You optimise for the conversion that reflects your actual business goal (almost always CompletePayment).

CVR — Conversion Rate

The percentage of people who clicked your ad and then completed the desired action. Calculated as: (Conversions ÷ Clicks) × 100. If your landing page CVR is below 1%, the problem is usually the page, not the ad. Above 2% is average; above 4% is strong for cold traffic.

CPA — Cost Per Acquisition

Total spend ÷ total conversions. The single most important metric for whether your campaign is profitable. Compare CPA against your product margin — if your product earns $40 profit per sale and your CPA is $55, you're losing money. Most e-commerce sellers target a CPA that gives at least 30–40% margin after ad spend.

ROAS — Return On Ad Spend

Revenue from conversions ÷ ad spend. A ROAS of 2.0 means you made $2 in revenue for every $1 spent. Note: revenue is not profit. A ROAS of 2.0 on a $30 product with $18 COGS and $5 shipping means you're breaking even, not winning. Always calculate ROAS against margin, not revenue.

CPC — Cost Per Click

Total spend ÷ total clicks. Tells you how expensive each click to your site is. Useful for diagnosing where spend is going, but less actionable than CPA or ROAS for e-commerce. A high CPC combined with high CVR can still be profitable; a low CPC with low CVR can lose money.

Bid and budget terms

Daily budget vs. lifetime budget

Daily budget sets a maximum per calendar day and resets daily. Lifetime budget is spent across a campaign flight with TikTok controlling day-to-day pacing. For most first campaigns: use daily budget. It's easier to control spend while you're learning what works.

Bid cap

A manual ceiling on how much you'll pay per result. Using bid cap gives you cost control but slows delivery — TikTok will pass on auctions where the winning bid exceeds your cap. Don't use bid cap on your first campaign; let TikTok optimise freely while you gather data, then introduce it once you have a target CPA to defend.

Cost cap

Similar to bid cap but more sophisticated — it targets an average CPA across all your ad auctions rather than capping individual bids. Preferred over bid cap once you have enough conversion data for the algorithm to optimise against.

Lowest cost (automatic bidding)

The default bid strategy. TikTok spends your budget as efficiently as possible without any manual cost controls. Highest delivery speed, least predictable per-unit cost. Best for learning phases and new campaigns.

Audience and targeting terms

Broad audience

Running with minimal targeting restrictions — letting TikTok's algorithm find your buyers from its full user base. Counterintuitively, broad often outperforms narrow targeting on TikTok because the algorithm is doing the audience work through the creative signal. Recommended for most first campaigns.

Interest targeting

Restricting your audience to users TikTok has flagged as having specific interests (e.g., "Beauty & Personal Care," "Home & Garden"). Can help focus delivery when your product has a very clear category fit, but often limits the algorithm's ability to find your actual buyers, who may not be labelled as interested in your category.

Custom audience

An audience built from your own data — website visitors (via pixel), customer email lists, or video viewers. Requires existing traffic or customer data to use. Most useful for retargeting: showing ads to people who visited your product page but didn't convert.

Lookalike audience

An audience TikTok generates to match the profile of your custom audience. Feed it your best customers (completed purchasers) and it finds similar users. Requires at least 1,000 matched users to generate reliably. Not useful on day one, but one of the most powerful scaling tools once you have data.

Pixel and tracking terms

TikTok Pixel

A snippet of JavaScript placed on your website that sends conversion event data back to TikTok Ads Manager. Essential for conversion campaigns. Without it, TikTok can't optimise for purchases and can't build custom or lookalike audiences from your buyers. Set this up before your first campaign — retroactive tracking doesn't work.

Events API (server-side tracking)

A direct server-to-server integration that sends conversion events from your backend to TikTok, bypassing browser-based tracking limitations (ad blockers, iOS restrictions). More reliable than pixel-only tracking. Shopify sellers can enable this through the TikTok app integration. Highly recommended once you're spending consistently.