Eh, last time I used a mod I had to put it into a new folder in my .minecraft titled 'Mods' then I had to open it and install then boot up Minecraft and select the modded profile, you need Forge I think for some mods as well. So if you need that and have it installed as well the Profile should be titled 'Forge'. Fairly simple I think but the last time I used mods was back in like... 1.7? No idea how different it might be now :/