No problem, I am happy to help! I didn't explained this in the post! Thank you for asking!

Curation on Steemit is when you upvote a content. This can be a post or a comment as well.
For example: If I (or anyone else) post something on Steemit (including this comment) and you upvote it you will get a curation reward after 7 days from posting. The curation reward is Steem Power.

I hope it's easy to understand!

Thank you for reading!

Enjoy Steemit!
Have a nice day!