fCommunity suggestions lists for Discover Spaces area:
(/portal/community/discover/communities):

• add a short information to Space Card showing how many members are in each Space.
• implement Search bar (similar to a filter in Members area: /portal/members) dedicated only for Searching specific Boards names or keywords in boards description. Searching suggestion show only boards that are accesible for that user only).
• implement Filter so user could search Public and/or Private Boards.