Another type of rich media advertising on Facebook is a post of an image. This is one of the most popular types of ads ever since Facebook began favoring visual content. The optimal size for News Feed photo ads is at least 1080 x 1080 pixels, otherwise your image will get cropped. Adjust your image based on the target audience's needs and by what will appeal to them the most.
Connections: You can target or exclude people who have an existing connection to your Facebook Page, your app, or an event you managed. For example, if you want to reach a new audience, your would select “Exclude people who like your Page.” If you want to promote an offer or new product to existing fans, select “People who like your Page” to reach people who already know your brand. You can also choose to target friends of people who have previously interacted with your brand. Facebook Pixel Purchase and Conversion Tracking with GTM | Part 3