October_session cookie

What does the october_session cookie do? I notice it is there even when I open my site in a private window and not logged into the CMS. I am setting up some rules in cloudflare to cache the site and just want to understand what this cookie does as the rules im adding may break the cookie if I cache the html. Any help on this?

PHP creates a session on the server side and uses that key to link you to that session data. It’s like a server-side cookie

If the page if read-only, there is a case to disable this cookie but in 90% of cases it is used, so it is enabled by default