What is Back link?

WHAT IS BACKLINK?
Backlink is a link one website gets from another website. Backlinks make a huge impact on a website's prominence in search engine results. Backlinks, also called "inbound links" or "incoming links," are created when one website links to another. The link to an external website is called a backlink.

TYPE OF BACKLINK?
Before we review a full list of backlink types, it’s important to understand what makes a link valuable. As mentioned above, backlinks are not all created equal. There are a variety of factors that can make backlinks more valuable than others, and there are also some that make a link very bad for SEO.we will discuses 2 type of backlink. 1-Do follow and 2-Nofollow.

What Is a Dofollow Link?
By default, all links are dofollow links unless they are modified to be nofollow links manually or are automatically changed by a website setting.Search engines crawlers follow dofollow links. In other words, they continue to crawl other pages they discover through standard links.

What Is a Nofollow Link?
Nofollow links are links with a rel=”nofollow” HTML tag applied to them. The nofollow tag tells search engines to ignore that link. Because nofollow links do not pass PageRank they likely don’t impact search engine rankings.

ADVANTAGE OF BACKLINK IN SEO
Before I talk about the advantages of backlinks, you need to know that much has changed concerning backlinks in the past couple of years. There was a time when even low-quality links helped in ranking a site. But ever since Google rolled out its Penguin algorithm, the whole landscape of backlinking has changed. It is important to have backlinks from quality sites, and those backlinks should be contextual. If, for example, you have a site about fish, and you are creating links from other niche sites about monkeys, these links will be of no use. Your goal should be to get links from authoritative and relevant sites.Now let’s take a look at why it is important for you to create backlinks to your site:

1. Improves Organic Ranking
Backlinks help in getting better search engine rankings.Important note: “SERP” means search engine results page. This screenshot is merely reflecting what people see in Google.Here’s an example.Take the topic “SEO Backlinks”.If I enter this search term into Ahrefs’ Keywords Explorer (a keyword research tool), I can see that most of the high-ranking pages have tons of backlinks:
If your content is getting links from other sites, that content will naturally start to rank higher in the search results. If it isn’t, then you need to get proactive and build them.Your goal should be to create links to individual posts/pages along with those leading to your homepage.If your content is getting links from other sites, that content will naturally start to rank higher in the search results. If it isn’t, then you need to get proactive and build them.Your goal should be to create links to individual posts/pages along with those leading to your homepage.

2. Faster Indexing
Search engine bots discover new webpages by following backlinks from existing webpages. Only when they’ve discovered your site can they crawl your site effectively.It will be more difficult for search engine bots to find your site if you do not have any backlinks. Especially for a new website, it is important to get backlinks as they help in the faster discovery and indexing of your site.

3. Referral Traffic
One of the major benefits of backlinks is that they help get referral traffic. Basically, a person who is reading a post may click on links in the post to find out more about the topic at hand.