Custom filters are a feature of question lists, which let you customize what questions you see and save those filters for quick access.

Custom filters are a feature of question lists, which let you customize what questions you see and save those filters for quick access. This applies to a specific site. See the announcement from July 2019.

Not to be confused with tag filters, which are filters across the stackexchange network, and also known as the Stack Exchangeâ„¢ GlobalTag MegaBlenderâ„¢.