The buzz score is directly proportional to the four following things, if you want your buzz score increased than you have to follow these four things..

1. The content you upload or write, must be original written by you.

2. The content shared by you of other users.

3. Your content shared by other users..

4. If you have the high buzz score subscribers than there are more chances of your increasing buzz score.

Here is a screen shot of the bitlanders website. Also a video for you to understand more.