Limited usage refers to the specified number of times a feature or tool can be used per month. For example, our personal use Hobby plan has a limited usage license of 100 event-adds per month. An 'event-add' is when someone clicks one of our tools (via a button or link) to add your event to their calendar, and our servers receive that request. If a tool exceeds the limit in the Hobby plan, it'll become unavailable for the rest of the month. Please check the limits included in each plan here.