A/B Testing or Split Testing - Testing different versions of your ads or audiences so you can see what works best and improve future campaigns.
Break-even Point - The point at which the total value of your costs is equal to the total value of your revenue.
Budget Optimization - The process of shifting budget away from low-performing to high-performing campaign attributes.
Clicks - The total number of clicks an ad has received.
Conversion - An action completed after seeing an ad.
Core Audience - Target audience using Facebook data (i.e. interests, behaviors, demographics, etc.).
Cost Per Purchase - The cost at which your ads convert a purchase.
CPM - The average cost for 1,000 impressions.
Creative - Pictures, videos or text contained within the ad.
Custom Audience - Target audience using data from your CMS, website, or other sources to target Facebook ads to people you already know.
Engagement - All actions that people take involving your ads. Engagements can include actions such as reacting to, commenting on or sharing the ad, viewing a photo or video, or clicking a link.
Frequency - The average number of times each person sees your ad.
Goal - What you would like your campaign to optimize for and see more of.
Impressions - The number of times your ads are on screen.
Lookalike Audience - An audience of people with similar characteristics to a data source that your define, such as past purchasers or your email list.
Objective - What you want people to do when they see your ads.
Pixel - A snippet of code placed on a website designed to record conversions from Facebook ads and build targeted audiences for future ads.
Reach - The number of people who see your ads at least once. Reach is different from impressions, which may include multiple views of your ads by the same people.
Relevancy Score - A rating from 1 to 10 that estimates how well your target audience is responding to your ad. This score is shown after your ad receives more than 500 impressions.
Retargeting Audience - Target audience of people who've already expressed interest in your product by visiting your website or checking out a product.
Return on Ad Spend - The total purchases conversion value divided by total amount spent.
Target Audience - An audience of people you'd like to advertise to, usually based on your ideal customer.