What is Finder and how can I like or skip users there?

Finder is an app section where you can find, react to, skip, and message other users. To open Finder, please tap the icon in the bottom-left corner.

Once in Finder, you will see the users that fit your filters: location, age, gender, and other preferences. You can check out each person's account, the user's exact location, occupancy, preferences, etc., by scrolling up. 

Suppose you Like the person, tap on the reaction button in the bottom-right corner of the photo. If you want to skip the user, tap on the cross icon in the bottom-right corner of the photo.
By tapping the middle button with a letter emoji, you can send a user the Major Crush feature, which allows you to send a message immediately.