Generally, you want to use tags to categorize your content...
So if you are writing about birds, you would use the tag birds.
But it also has to do with the different tribes and having your content show up on their front end and to earn rewards.
LeoFinance - leo is the tag
ProofOfBrain - proofofbrain is the tag
clicktrackprofit - ctp is the tag
sports talk social - sportstalk is the tag
But it's very important that you respect the tag. So don't talk about 'birds' in Leo for example. Or financial and crypto news in Sports Talk, etc...
thanks this helps.