Here are the types of Link Building:

i) Authority Link- It helps to get links directly from sources that would be considered trusted seed sites in algorithms like DMOZ, the Yahoo! Directory, and Wikipedia might be considered obvious authorities and trust seed sites.It can be done for good search engine ranking, increasing link popularity and attracting more traffic to self-owned website.

ii) Directory Link- It is the process of building a link with few well-known directories like Dmoz, Yahoo.dir, and business.com in order to find niche directories.

iii) Reciprocal Link- It is the process of exchanging links based on some agreement between two trusted websites who shares the same business interest with an aim of increase website traffic and link popularity.

iv) One-Way Link- It is the process of link building where link is built with some website on their interest, without getting connected back to that website. It is also called inbound link, which is highly important for link popularity.

V) Press release links - Press releases are generally NOT a great way to get links, but you can pick up some that may be of value. Every little bit helps, and remember (again) this is only a small part of your overall link profile.

Vi) Article links - This can be a GREAT way to get some good authority links from high profile sites. They’ll appreciate great content in return for the exposure and link popularity you’ll receive. The better the site is, the higher quality content they will require. There’s no such thing as a free lunch.

Vii) RSS/ Blog aggregated links - Not worth a whole lot, but you’ll pick up a whole bunch of links this way. They’re “power” is minimal at best and highly debated. There are, however, plenty of legitimate sites that aggregate content where you may pick up some decent links.