Can Someone Explain What a Backlink Gap Is?

Hi everyone,

I’ve been reading up on SEO strategies and came across the term "backlink gap." I understand that backlinks are important for improving search engine rankings, but I'm a bit confused about what a backlink gap specifically refers to. Can someone please explain what a backlink gap is and why it matters? How do I identify the backlink gap for my website compared to my competitors, and what tools or methods should I use for this analysis? Any insights or tips on how to close this gap would be greatly appreciated!

Thanks in advance for your help!