Which tag I can use?

Not sure how to answer that. Do what works best for you as part of your overall blogging strategy.

This community does not have a tribal tipping tag. I generally use tags where I have lots of tokens staked.

As far as promoting The #PEPT Game I suggest doing some PeakD Snaps and including PEPT as the tag. When you make your Snap, use the link from The PEPT Game community as shown in the image below.

Note the image below. Doing Snap within the community provides an opportunity for free advertising. Well, more or less free. !LOLZ