It has no relevance to your grades or future, though it is good practice for public speaking. My school literally told us it was irrelevant, and didn’t take it too seriously. Our teacher made us talk about a pet hate we had, some people talked about hating scooters, hating dominos, I talked about why I hate year 7 (ironic now that I mentor a year 7 form) it’s not something to take seriously, just have a bit of fun with it