What are Dofollow & Nofollow links | Difference Between Dofollow And Nofollow links

what are backlinks and what are dofollow and no follow backlinks in seo in hindi/urdu.Diffrence between no follow and dofollow backlinks.All about backlinks in Seo hindi video tutorial.

What are Dofollow & Nofollow links 

Difference Between Dofollow And Nofollow links

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