Can you convert to USD on Coinbase?

Excuse me, could you please clarify for me if it's possible to convert my cryptocurrency holdings into US dollars on the Coinbase platform? I'm not entirely familiar with the process and would appreciate any insight you may have on the matter. Specifically, I'm wondering if there are any limitations or fees associated with converting my crypto assets to USD on Coinbase. Additionally, could you provide me with a brief overview of the steps involved in the conversion process? Thank you for your time and assistance.