In terms of how they’re built, backlinks can be of numerous types. Some popular types include guest post backlinks, HARO backlinks, and podcast backlinks. You can divide the into two types based on their attributes.
Backlinks with a “Do-follow” attribute. It lets search engine bots pass the link juice.
Backlinks with a “No-follow” attribute. It prevents search engine bots from passing the link juice
You need to build both types of links in order to keep your link-profile natural.