If you are a client, take advantage of unlimited monthly updates to your website.
This includes adding to or editing your News section, adding or removing photos, videos, etc. It does not include redesigning or adding new content pages unless there's a flaw in the design or something isn't functioning properly. 
 
I always make sure the mobile version is up to date as well. 
At the beginning of every month, even if you don't have any updates, I go in and make sure everything looks good and functions properly. If I find anything that needs your attention, I will let you know. This will make sure your site is "alive and breathing" with updated SEO etc.
Subscription runs on a monthly basis, until canceled.