Link

Backlinks are links from other websites that point back to a website. Backlinks are important for SEO because some search engines, especially Google, will give more credit to websites that have a good number of quality backlinks, and consider those websites more relevant than others in their results pages for a search query.

No. Getting backlinks from spammy websites or unrelated-to-your-business websites will not help you but most probably will harm your rankings.

These are a number of educational links meaning that are links coming and provided from official educational institutions i.e. universities. These links have more value than the regular .com .gr .co .nl

These refer to a number of government links. Thus, links come from NGOs or governmental institutions. These links have more value than the regular .com .gr .co .nl

The number of links that are do-follow. DoFollow backlinks carry all the SEO value

If you don't explicitly set your link as a no-follow then it will be do-follow. Therefore, the default is do-follow

Links that are inside an image. These links have less value than the regular editorial link

That all links should be relevant and related to your goals. Just getting the bad (in terms of unrelated traffic) will be ok for your SEO team but bad for your business.

The number educational websites linking towards the target. .edu websites carry more weight

This refers to government-related websites/domains. .gov sites, carry more weight.

Referring domains are the number of domains/websites that are linking towards a website. This is one of the most important metrics as it affects all the others, in general, the more the better

This number demonstrates the strength and authority of a target URL. This is a number between 1 - 100 that is calculated based on links in a logarithmic scale

Website's authority predicts how well the website will rank on search engine result pages (SERP). A search engine considers the content of the sites to determine the QUALITY of a link. When inbound links to your site come from other sites, and those sites have content related to your site, these inbound links are considered more relevant to your site. Therefore, your site has more authority