Probably Yahoo. I had dialup in the 90s and Yahoo was the gold standard for search.

I remember trying Ask Jeeves later, but always went back to Yahoo when it inevitably failed to find what I wanted.

I played a ton of Yahoo games and remember getting into their "gambling" games as a kid (mostly blackjack, but also holdem on occasion). I would play at night when my parents were asleep because I want allowed to tie up the phone line during the day unless I headed to for school.