Updating php - site health gives me this msg

"PHP modules perform most of the tasks on the server that make your site run. Any changes to these must be made by your server administrator.
The WordPress Hosting Team maintains a list of those modules, both recommended and required, in the team handbook (opens in a new tab).
Warning The optional module, imagick, is not installed, or has been disabled."
I am a begginer. What should I do?
Thank you