What are Dofollow and NoFollow?
The Nofollow link means it brings the traffic to your website but it does not increase the ranking in search engines. To avoid the penalty in the search engine you can make the link as no-follow. Simply, saying the search engine not to count this link.
The Dofollow link means to bring traffic to your website, helps to boost your website ranking. Simply, saying the search engine to count the link. When you allow the search engine to count the link it crawls the content in the link and checks the authority of the website. If the link has some penalty means it affects your ranking also.
Backlinks are the link from one website to another website. The backlink is also known as an inbound link or incoming link. You should be very careful while using the link exchange on your websites.
Internal Links and External Links:
Internal links are a link from one page to another page on the same website or domain. These links help to increase page authority. Internal links are useful for the users, by using these links they can easily move from one page to another.
External links are a link point from an external website to your site or linking from your website to another website to provide the additional information for the users. Difference between external links and internal links.
Difference between Dofollow and NoFollow Links:
Links are used to telling the search engine bots to closely-related websites. Linking your website with the dofollow and nofollow links is not important you should link your website with the proper keywords and the contents are related to your websites.
Nofollow links tell the search engine bots not to follow the links. By giving nofollow only human beings are able to follow the links the search engine bots do not follow the links. Dofollow links tell the search engine bots to follow the link and reach our website. If you use the dofollow link then the human beings and search engine bots can able to follow the links.
If you are advertising, paid ads or others link then you can use the nofollow links. You can use dofollow links with the websites whose contents are closely related to your sites.
Northcutt is a tool used to check for the number of NoFollow links available on your website.
Rankwatch is a tool used to check for the number of Dofollow links are available on your website.
Refer here to know more about On-page SEO and its factors.
Refer here to know more about Off-page SEO and its importance.