From time to time, Roll20 may expose Beta Features that are available on an opt-in basis to users. You can choose to opt-in to these features using the Beta Features toggle on the Settings tab inside the VTT.
What's Currently in Beta (on Classic Tabletop)?
New Compendium Search
The New Compendium Search is a redesigned Compendium interface inside the VTT that makes it even faster to find what you need while you're playing. We're up to 10x faster now at returning your results so you can stay in the game, and there's advanced filters to help you find exactly what you're looking for.