Link Pyramid is one of actual SEO method which is used for ranking web sites quickly. Link Pyramid is structured by forming the composition of backlinks patterns such as pyramids. It mades with the purpose of building backlinks become more structured so that search engine robots are not detected as spam backlinks.
Reverse SEO is the practice of taking actions for decreasing the rank of a page or website in Google and other search engine pages. Reverse SEO may be used for penalyzing competition websites. It is then called negative SEO and the practice presents legal risks.