Maintenance page is available to host side for multi tenant applications (for single tenant applications it's shown in tenant side) and shown as below:
In the Caches tab, we can clear some or all caches. Clearing caches may be needed if you manually change database and want to refresh application cache. CachingAppService is used to clear caches in the server side.
Website Logs tab is used to see and download logs:
WebLogAppService is used to get logs from server.