The internet comes up with really strange names for stuff, but calling silly general audience jokes "dad jokes" is a pretty fitting description, since they're the kind of jokes a dad would share with his kid.
You could also call them kiddie jokes, mom jokes, uncle jokes, aunt jokes, or brother or sister jokes for that matter, but I guess with all the dad bod, dad hat and dad hack trends online calling them dad jokes just made sense.
If you're a collector of PG-rated "dad jokes" and you're looking for some seasonal material then sink your eye teeth into BuzzFeed's 19 Halloween Dad Jokes That Will Make You Groan And Laugh and get ready to scare up some smiles!
See 19 Dad Jokes That Will Make You Groan And Laugh This Halloween here