Hi! They are tokens, about the delegation you can use it for upvoting (curate) good content mainly those using #creativecoin tag. Doing this you will be able to earn some curation rewards.

You can check on https://steem-engine.com/ to see how much tokens you have earned so far. You can chek this in a front-end like https://www.sonicgroove.net/ you just need to go to wallet

I hope this information could help you.
Congrats!