Backlink submission is part of search engine optimization (SEO) activity and helps to gain more popularity, ranking higher in search results. Backlink Submitting a website to high PR directory submission sites improves website ranking and gets more traffic.
When submitting a URL to any backlink site, you should at least check the Alexa rank of that backlink submission site. Alexa rank must be less than 1 million and you should not submit the URL of your website to any spam site.
Everyone loves it for free. Most of the top backlink submission sites offer your website link for free. But with the free deposit scheme, it takes time and there is no guarantee that your link will be approved or not.
Paid backlink submission sites provide you a backlink within 24 hours and for this, you have to pay some amount.
In the mutual backlink submission, you must add a link to your site and after that, your link will be approved by the directory’s administrator. But I would suggest not trying to render reciprocal directories.