What is baclinks on website in seo?? details
Short: See it as recommendation to your website.
If you have a website about car tyres and I write an article about best car tyres and link as source or reference to your website, you get a backlink from me. Now it depends on the domain authority and page rank of my site how much value this backlink has.
As more quality backlinks as better your ranking in google. Even if people saying backlinks are not as important anymore as it was a few years ago, if you create a 3 tier network it still helps you to rank for certain keywords
Mate, just google What is a backlink and you get stuff to read for the next two years
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