Link pyramid is well-known link building strategy nowadays. It is a structured form of link scheme using several tires of links. Link pyramid is way to represent tiered link building.
Link Pyramind is the first back linking strategy and the whole process aims to create a network of related seo links to optimize a site and gain higher ranking on search engines.
Link pyramids are a way that some people use to try to trick Google search into believing thier own site is very popular and has many backlinks. The theory is that if you backlink to your site and then backlink to your backlinks and so forth, that your own site will appear more popular.
However, Google is wise to link wheels and any variation and has made it against their TOS to use link schemes/link wheels or any variation there of designed to manipulate or trick search engines.
But, you don't have to resort to these tricks to get backlinks.
Just stick to creating really good, worthwhile content that people will want to read and you should get backlinks naturally from other bloggers and forum owners who want to recommend your cnotent. These natural backlinks are a good thing and will help your site rank better.
Link pyramids is way to make backlinks more strong to your website. The main purpose of this technique is to have a chance for our backlinks to be crawled and transfer bots as well as relevant traffic to our website. It is a brown hat technique, not so impressive as was in the past due to Google smartness.