Come Through

The internet slang term “Come Through” basically means that someone or something is impressive, reliable, or meeting expectations.
Examples:

If my friend says they’ll bring food to the party, and they actually show up with pizza and snacks, I would say “Wow, they really came through!”
When a person is feeling down and a friend sends them a motivational message that lifts their spirits, they might reply with “Thank you for always coming through for me.”