Harmful backlink sources are links from poor quality, spam or irrelevant sites that can harm your website's search engine ranking and reputation. Harmful backlink sources include:
Useful backlink sources are links from quality, relevant and reliable sites that help your website rank better in search engines and attract more visitors. Useful backlink sources include:
The importance of backlinks is that they help your website rank better in search engines and attract more visitors. How to get backlinks? Which backlink sources are harmful? Which backlink sources are useful?