When a user logs into a website, a session is often established. The browser and server exchange a session identifier, so the server knows who it is talking to with each subsequent HTTP request.
Headers ▼ General Remote Address: 121.232.112.200:443 Request Method: GET Status Code: 200 OK ▶ Request Headers ▼ Response Headers Set-Cookie: session_id=142983010 Set-Cookie: user_id=3829