Can you elaborate? Why would it have the "DC license" on them if they're not DC related?

I you're talking about the shoes, that's a separate brand.

You mean stuff Scooby-Doo or Looney Tunes comics? That's because DC has/had their publishing rights, simple as that. One of the reasons might be shared ownership by WB.

No I mean like how there was Hershey chocolate with dc on and cereals and the vital Heros and all those trading card games, it seems very easy to get the dc license

If there's money making potential, companies will talk about cross promotion. Both benefit. Companies have entire departments dedicated to that. That doesn't mean it's easy to get.

I mean it’s easier then marvel license, the dc license seems easier cause there’s more cross promotion

DC just wants to diversify its income. Marvel is undeniably a bigger seller so they don't need it that much.