Spam indexing
 

What is spam indexing?

Spam indexing refers to practices that are untruthful to boost the ranking of web pages in search engines. The purpose or point of indexing is to repeat the key terms of spam, so that those search engines that rank-term repetition of the rank of the indexed pages of spam over the other.It includes content spam such as keyword stuffing, hidden text, link spam such as hidden link, cloaking etc.

I don't think this method will survey after all new updates of google.

The practice of using improper Search Engine Optimization (SEO) tactics in an attempt to manipulate or elevate the placement of a web site on a search engine's search results pages

Spamdexing, which is a word derived from “spam” and “indexing,” refers to the practice of search engine spamming. It is a form of SEO spamming.