- Links from a globally prominent and important website are valued more.
- Links from the subject relevant website are valued more than general or off-theme sites.
- Links from websites which have anchor text with the right keywords are ranked high.
- Links from highly trusted domains such as universities, government websites, etc., rank high.
- Link neighborhood (links from/to your website) demonstrating spam websites have the least value.
- Links decay over time; it is important to continue earning links to rank high for them.