Sometimes shortcut is a good option, so today I will tell you a shortcut way to get backlinks and Domain Authority. You can get tons of backlinks from expire domain. I will discuss what is expire domain, and how to find the expired domain and I will give a demo on how to buy expire domain with urls.
Expire domain is a domain which is not alive but you can have good backlinks on that domain if the domain owner had created.
here is the to buy expired domains:
How to check DA PA of the domain
URL to check domain is banned or not for Adsense or search engine
Here are the domain links where you can create do follow backlinks on .org websites and .com website.
100% do follow backlink video part 1
How to create backlinks: Create dofollow and No follow Backlinks in Hindi 
How to create backlinks: Create dofollow and No follow Backlinks in Hindi [Part 2]
What is backlink, dofollow link and no follow link in hindi [With Demo]