The riff is a short and catchy melodic idea and it recurs so often that it gives character and structure to a song. The hook is any part of a song that is meant to grab the listener's attention. The hook is also catchy but it doesn't recur as often so that it makes a greater impact when it turns up.
What's the Difference Between a Hook and a Riff?
Is there a difference between a riff and a groove? - Quora
What are the most famous/popular riffs in music history? - Quora
KOHLER Riff J-Hook Double Robe/Towel Hook in Vibrant Polished Nickel 27411-SN - The Home Depot
Ryan Tedder Interview: A Fan Of Music Talks About The Craft Of
What's the Difference Between a Hook and a Riff?
What's the difference between a riff, melody, and hook? - General Discussion - Elektronauts
What is the difference between an ostinato and a riff in music
Is there a difference between a riff and a groove? - Quora
In music, what are verse and chorus/refrain/riff/hook respectively?
Sometimes you wake up in the morning - Blue Magic Music
What is the most memorable or recognizable riff in all of music
