What are tags and how can I use them in the web app?

You can assign a tag to each of your contacts. These tags can help you categorise and classify your contacts, for example, "friends", "colleagues" or "family".

 

In the web app:

 

You can then use filters in My Contacts to filter your contacts by tag:

Similarly, you can filter and group your contacts by tag on your maps or search for contacts based on tag in search: