Back links are nothing but the links coming to our website. It is very important for the SEO purpose if many sites link to the same website search engines like Google can crawl the content is and it is worth linking to. So try to build more back links to get good ranking in the search engines.
Back links are the incoming links that come from the other website to your website. They pass the link juice to your website and helps to increase the traffic.
A backlink for a given web asset is a connection from some other site to that web asset. A web asset might be a site, website page, or web registry. A backlink is a reference practically identical to a reference.
Backlink is a link one website gets from another website. Backlinks make a huge impact on a website's prominence in search engine results. This is why they are considered very useful for improving a website's SEO ranking. Search engines calculate rankings using multiple factors to display search results.
In SEO, backlinks are an Off-page SEO method. It is a link of your website which is created in other's websites which has high DA and provides dofollow links. For example, blogging, forum posts, classified ads, press release submission etc.