This looks like a specific request for a tutorial or documentation on how to install a Minecraft resource pack, specifically the pack.
The Glorious_Cotton_Candy_16x.zip file downloaded to your local directory. Installation Procedures Phase 1: Accessing the Resource Pack Directory
Press the on your keyboard to open the "Run" dialog box. Type %appdata% into the field and press Enter . Navigate through the folders: .minecraft > resourcepacks . Phase 2: Manual Extraction via WinRAR