Different from On-page SEO, Off-page SEO relies on activities conducted outside web page boundaries.
This includes :

Link building is the most effective method of Off-page SEO.  By building backlinks to your website from external sources, you are attempting to gather more votes. So you really need to buy backlinks if you want to win the game. This will help you sidestep your competition to rank higher in search engines as part of your overall SEO strategy for your website.