Backlinks boost your website SEO, backlink is like a link between two websites.
Because of backlinks SEO shows the visitors that website has good informative content when user visit your website, so in other word we can say backlinks do play a big role in search engine optimization.
Backlinkyourwebsite gives you 100% organic link for your website.
for now you can create single text link for free, but if anyone want to link with picture or banner then you have to pay a very minimal amount which is $3 USD for 1 year.