The set of methods website optimization, which are not particularly welcome by search engines and can be defined by them as manipulating results ranking, but at the same time, they are quite effective in terms of search promotion.

Are safer than "black" SEO methods, but not as much as "white".

The main methods of "gray optimization" include:

1) Formation of the external reference profile using:

2) Text optimization content on the edge "for robots/for people ”- the creation of interesting and useful texts with sufficient content keywords.

3) Building an Accompanying Network Advanced Website satellites, which are created manually and are filled with high quality content.

4) Dorway with relatively high-quality content and the lack of automatic user redirection.

“Serial” optimization is most often chosen by gray hair to promote sites due to its effectiveness and comparative safety in terms of overlay sanctions search engines.