The active collections are those collections published and visible for your viewers.
Depending on your account type, you may have more or less active collections.
Limits are indicated on your Manage Collections page and there is a limit on the number of active collections you can have.

Learn more about how to activate and deactivate collections in the article: How can I manage my collections?
Do you want to know more about limits? Check Can I increase the limit of collections I can have?
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