Happy link Day

I will just like to say happy link day

Links we're released yesterday for me I believe lol

hey everyone,
ok so all these new platform popped up and i would like someone to explain them to me and what all these new ones are called? Btw with dueling books which is just a new version of DN....somewhat. The difference is that they reset ppl's stats after a month or whatever. They didn't use to to that on DN at least that i know and the chat is a little differen/looks different. They even have this weird thumbs thing up/down, Anyways can ppl also make a custom profile pic. Or do they only have it so we use theirs only? What does redeeming a code do and wadafuq are those??? what is duel links is that another platform for dueling like ygo pro, dueling nexus, etc. Will someone plz list all the current ones, which ones are good/okay to use, and any advice on which one to use?
someone please explain to meh?
thanx

duel links is a mobile game dueling book, dueling nexus are all yugioh games on the internet and ygopro and devpro can be downloaded

Someone should give me links to Link guides and how to catch up with current YGO.