zip file you downloaded in the first step to the newly opened 'resourcepacks' folder. – folder titled 'resourcepacks' will pop up – if there are many different versions, just choose the one you like, is compatible with your version/edition of Minecraft, the one you think your computer can handle in terms of performance. – general recommended step for all packs, Optifine is also needed for most shaders
Most resource packs require Optifine, so be sure to download and install it.
