Use workflows to automatically tag members and then use those tags to setup targeted campaigns.

For example - setup a workflow to target members who entered Level 3 and have been Active in the Last 15 days. Add a tag to them as ‘Top contributors’. Create another workflow and only include members with this tag to start enrolling them into an Ambassador program.

You can also use workflows to tag as well as remove tags from members.

For example - create workflow and add a ‘Dormant’ tag to those members who have been Inactive in the last 30 days. Send an activation message, add delay for a week, and check to see if they’ve posted a message in the community. If they have, remove the ‘Dormant’ tag from them. And continue sending activation messages if they haven’t.

Read this article for more details.