Totally New to Mods and Nexus

[crayzielaygz]

Hi y'all, I have finally decided to download a mod for a game and sadly it is not showing in my game. I've saved the file to the file the game was on. Then scanned integrity files to make sure everything was alright. Started my game, and nothing. Not showing the mode I downloaded. Can anybody assist me on what I did wrong? 

[showler]

Need some details.  What game?  Can you tell us the mod?