what does extract mean and how do u do it?

what does extract mean and how do u do it? i have problems and am stuck at this various step. can u plz help?

Go on google and search win.rar download and download the latest version, after u download, right click the file that u want and it says extract here or in a folder. I personally recommend extract here so u might not have to search ur whole pc. If i helped u, thank me for more help! xD

Thanks for the help