Hi @Nelli79 ! A very warm welcome to the Community Center and it is so lovely to see that you're curious to know how levels work on our Community. 🌻
Levels indicate how much a user is actively contributing to the Community Center! There are multiple factors that contribute to reaching certain levels.
The more constructively you are able to help the Community, Hosts and guests, , the more you can achieve a higher level. It is not just limited to the number of replies, but also other activities like the number of likes you have received, the number of best answers you've marked, and your comments being marked as best answers/solutions by other users who originally posted a question. It also depends on the number of posts or conversations you create to help other Hosts/guests.
I hope the above explanation helps!