Basically, it works like this:
You and your friends sign up and send each other invite links to connect.
Then, you can answer questions about each other and fill your profiles with attributes and nice texts. After that, you can search for matches for each other.
To do this, you need to activate your search beforehand. If your friends have liked a profile for you, you'll only get a match if the person's friends have also given their approval. Once you`ve matched, you can of course chat with them yourself.