Backlink
A link from one website to another. Search engines treat backlinks as votes of confidence — more high-quality backlinks generally mean higher search rankings. Backlink analysis is a core SEO practice.
Why it matters
Backlinks are one of the strongest signals search engines use to decide which sites to trust. When a respected website links to yours, it's like a recommendation that can lift your rankings and bring in visitors. They matter to anyone building an audience online, from bloggers to businesses. But quality beats quantity: a few links from reputable sites are worth far more than dozens from spammy ones.
In practice
You write a genuinely useful guide on composting. A popular gardening magazine notices it and links to your guide from one of their articles. That single backlink sends their readers to your site and signals to Google that your content is credible, nudging you higher in search results. Over time, a handful of links like that from trusted sources can matter more than any keyword trick you try.
Related terms
Domain Authority
A search engine ranking score (1-100) predicting how likely a website is to rank in search results. Higher authority sites earn more trust from search engines. Built through quality content and backlinks.
SERP (Search Engine Results Page)
The page displayed by a search engine in response to a query. SEO tools analyze SERP features — featured snippets, People Also Ask, knowledge panels — to optimize content for visibility.