Facebook page custom audiences allow you to create an audience of people who interacted with your page to be used in ad targeting.
Facebook Pixel
The Facebook pixel helps advertisers track events that occur on their website and reach people who performed those events with ads.
Frequency
Calculated as (Impressions/Reach), Frequency is a Facebook ads metric that measures the average number of times users have seen your ad.
Frequency Capping
Frequency capping allows you to limit the number of times your audience sees your ad during a given window of time.
Highest Value Bid Strategy
The default bid strategy when using the Purchases objective and “Maximize value of conversions” performance goal. Instead of trying to get you the most conversions within your budget, Meta’s focus will be on getting you the highest purchase value.