Rules use plain text in the headline and summary together (case-insensitive). Each row you add is one rule; if it matches, that entry is hidden.
Global filters apply to every RSS badge. Per-badge filters only apply to that badge. Both can stack.
Rule: ad, promo
Matches (hides): “This ad is short” or “Our promo ends Monday” (either word is enough).
Won't match (shown): “News roundup” (neither “ad” nor “promo” appears).
Rule: live + blog
Matches (hides): “Live updates on our blog” (both words must appear).
Won't match (shown): “Live from the studio” (missing “blog”).
Rule: live + blog, sponsored
Matches (hides): “Sponsored content” OR “Live blog recap” (comma means either branch).
Won't match (shown): “Live report” (no “blog”, no “sponsored”).