If you want to chat with the person - SWIPE RIGHT ("Liked" the person)
if you do no want to chat with the person - SWIPE LEFT ("Unliked" the person)
If the person you like also swipe you right, a chat room will be automatically activated.
The person you swipe left will not be able to track back.
Don’t forget that the more you swipe, the more matches you will have.
To find the differences between like, gift and question, please check the link below: