If you install the brand page wordpress plugin?

ah ok, that's quite convenient,,,,,,,, tnx for clarification cheers

Zarada the share plugin adds a button at the bottom of each post (or whereever you position it) that lets your readers share your post on APSense when they click it. If they are not a member of APSense, they can join as your referral.

is it similar to lets say fb plugin, so it post yor post on apsense?

Yes, that's correct. The only downside I found so far is it doesn't work to share Pages, only Posts. I made a comment about that, but in the meantime I will work around it.

The other one means the share button right?

If you install the other one it generates referrals for APSense, but I don't know about the Brand Page one.