Only functional cookies are stored on the community websites. These cookies are strictly necessary.
Once a member is logged in, the following cookies are stored in the browser:
ARRAffinity = load balancing / session stability
Antiforgery = protection against CSRF
Identity.Application = login/authentication
ARRAffinity
This is a cookie from Azure App Service.
It ensures that your browser is consistently routed to the same server (or instance) of the application during a session.
It is needed to maintain “sticky sessions,” so you don’t get routed to a different server with every request (which could cause errors or logouts).
.AspNetCore.Antiforgery.[…]
This is an anti-CSRF (Cross-Site Request Forgery) security cookie.
It contains a token that the site uses to verify that a form or request really comes from you, and not from a malicious website.
It therefore helps protect against forgery attacks.
.AspNetCore.Identity.Application
This cookie is set by ASP.NET Core Identity (the built-in authentication system of ASP.NET Core).
It is usually an authentication cookie: it records that you are logged in and which user you are.
Without this cookie, you would need to log in again with every click.