Online Advertising Acronyms: 15 Ad Terms Explained (2026)

How many online advertising acronyms do you know? Whether you run AdSense on a blog, buy Google Ads for a small business or just read marketing reports, the same short forms keep showing up: CPC, CPM, CTR, RPM, ROAS and more. This guide explains the most common ad terms in plain English, with simple formulas and examples, updated for 2026.

Online advertising acronyms at a glance

Traffic terms

1. UV – Unique visitors

The number of different people (in practice, browsers or devices) that visited a site in a period such as a day or month. One person returning five times is still one unique visitor. In Google Analytics 4 (external site) the closest metric is Users or Active users.

2. PV – Page views

The total number of pages loaded. Page views are always equal to or higher than unique visitors, because one visitor often reads several pages. GA4 calls this Views.

Pricing models

3. CPC and PPC – Cost per click / Pay per click

The advertiser pays only when someone clicks the ad. CPC = total cost / clicks. Search ads in Google Ads (external site) and Microsoft Advertising mostly use this model. PPC is the name of the model; CPC is the price per click.

4. CPM – Cost per mille

“Mille” is Latin for thousand. The advertiser pays for every 1,000 impressions, whether or not anyone clicks. CPM = (cost / impressions) x 1,000. Banner and video campaigns that aim for awareness are usually bought on CPM.

5. vCPM – Viewable CPM

Like CPM, but only counts impressions that were actually viewable. The common industry standard is at least 50% of the ad visible for one second (two seconds for video). Google Ads offers vCPM bidding for display campaigns.

6. CPV – Cost per view

Used for video ads, for example on YouTube, where you pay when someone watches a set part of the video or interacts with it. Older guides also used PPV (pay per view) for pop-up and interstitial ads.

7. CPA – Cost per action (or acquisition)

The advertiser pays when a user completes a specific action such as a sign-up, install or purchase. CPA = cost / conversions. Google Ads’ “Target CPA” bidding tries to get as many conversions as possible at your chosen CPA.

8. CPL – Cost per lead

A type of CPA where the action is a lead: a form fill, quote request or newsletter sign-up. Common in B2B, insurance and education.

9. CPS – Cost per sale

The merchant pays a commission only when a sale happens. Most affiliate programs, such as Amazon Associates (external site), work this way.

Performance terms

10. CTR – Click-through rate

The share of impressions that turned into clicks. CTR = (clicks / impressions) x 100. If an ad is shown 2,000 times and gets 30 clicks, CTR is 1.5%. Publishers can test ad positions to improve it – see our guide to A/B testing AdSense for higher CTR.

11. CR or CVR – Conversion rate

The percentage of visitors or clicks that complete the goal (purchase, sign-up). CR = (conversions / clicks or visits) x 100.

12. RPM and eCPM – Publisher earnings per 1,000

For publishers, RPM (revenue per mille) shows estimated earnings per 1,000 page views or impressions. Google AdSense uses Page RPM (external site) and Impression RPM in its reports. eCPM (effective CPM) is the older ad-network term for the same idea. RPM = (earnings / page views) x 1,000.

13. ROAS – Return on ad spend

Revenue earned for each unit of ad spend. ROAS = revenue from ads / ad cost. A ROAS of 4 (or 400%) means you earned 4 for every 1 spent. It is the main success metric for most e-commerce advertisers.

Ad tech terms

14. RTB – Real-time bidding

An automated auction that happens in milliseconds as a page loads. Advertisers bid for each individual impression, and the highest bid wins. Most display advertising today is bought this way, which is called programmatic advertising.

15. DSP and SSP – Demand-side and supply-side platforms

A DSP is the tool advertisers use to buy ads across many sites (for example Google’s Display & Video 360). An SSP is the tool publishers use to sell their ad space to many buyers (for example Google Ad Manager). They meet in ad exchanges.

Which acronyms matter most for you?

• Bloggers and publishers: PV, RPM, CTR and CPC. RPM tells you what your traffic is really worth. Our AdSense heat map guide explains where ads tend to perform best.
• Advertisers: CPC, CPA, CR and ROAS. A low CPC is useless if CR and ROAS are poor.
• Affiliate marketers: CPS, CPL, CPA and CR.

FAQ

What is the difference between CPM and RPM?

CPM is what an advertiser pays per 1,000 impressions. RPM is what a publisher earns per 1,000 page views or impressions after the ad network’s share. RPM is usually lower than the CPM advertisers pay.

What is a good CTR for ads?

It depends on the format and industry. Search ads often get several percent, while display banners commonly get well under 1%. Compare your CTR with your own past results rather than a single benchmark.

Is PPC the same as CPC?

They are closely related. PPC (pay per click) is the advertising model, and CPC (cost per click) is the actual price paid for each click.

What does ROAS mean in online advertising?

ROAS means return on ad spend: the revenue generated divided by the money spent on ads.

Originally written by guest author Daniel Scocco, who started building blogs and websites in 2005. Updated for 2026 by QuickOnlineTips. Read our guest blogging guidelines.

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