Conversation so far:
who has won the most men's grand slams
Roger Federer has won the most Grand Slam titles, with a total of 20.
when was roger federer's most recent grand slam win
Roger Federer has most recently won the Australian Open in 2018.
why is the grand slam so important
The Grand Slam offers the most ranking points, prize money, public and media attention, the greatest strength and size of field, and greater number of best of sets for men.

Question: where does the tournament name come from
Self-contained rewrite: where does the name grand slam come from