I want to know the meaning of pyramid linking .Kindly explain some information about this.

Link pyramids are a pictoral/theoretical breakdown of how the back links of any website should look like. The visual representation of the link pyramid is the exact representation of the back linking strategy that all websites/blogs should follow. The base or the bottom part of the pyramid should contain low quality links – numerous in numbers. Low quality links are easy to obtain but do not individually add much back link value to a site. But collectively, they can pass on considerable amount of link juice to the mid level links.