Facebook has the same capability. An advertiser can advertise to a list of leads or customers by uploading a list of email addresses it already has into the Power Editor to make a custom audience. A good retargeting ad acknowledges that the brand knows you're already interested in its product. (Because, let's face it ... retargeting can be a little creepy.)
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. Fix Can't Turn off Limit Ad tracking iOS 12| How to Fix limit ad tracking greyed out on iPhone
It's valuable. Since the image was taken on a beautiful day, it looks like an ideal place to be -- especially to those of us viewing it from our office desks. It also clearly tells you the cost of the ticket so you know before you click. (This is also good for the advertiser: By including the price, the ad allows users to self-select based on whether they can afford the ticket. If they can't afford it, they won't click through, thus saving the advertiser money on unqualified clicks.) How do you know who is tracking you on Facebook?