I have been working hard on my SEO and want to check how many backlinks my site has.
I have come across different sites where you enter your URL and will tell you how many backlinks you have.
All of them are coming up with 0 backlinks. Even if I type in a well known site like facebook or youtube, still comes back with 0.
Would be grateful if you could let me know what sites/tools you use to check how many backlinks you have to your website.