difference between do follow and no follow?

[marka3441]

These are the permission provided to the links in your website.
Nofollow: These perimission means no juice is passed to the link mentioned i.e crawler won't crawl the website link mentioned
Dofollow: These permission means juice is passed to the link mentioned i.e crawler will crawl the website link mentioned and your website will provide back link to the website whose link is mentioned.