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cache frequencyNoun phrase. The rate at which a search engines publicly displayed cache image of a Web document is changed. Used by some SEOs to measure the quality and value of Web documents and sites for search engine optimization (q.v.).
black hat seoAggressive SEO strategies with the intention of manipulating search engines. Tactics against webmaster guidelines that can cause a site to receive a penalty or be banned from search results.
on-serp seoOptimization practices that take place in search engine results pages.
critical rendering pathThe sequence of steps a browser goes through to convert HTML, CSS and JavaScript into a viewable web page.
code swappingCode swapping is similar to cloaking and aims at changing the content in a site after high ranking has been achieved for that site. Basically, the optimised page is switched with another, different from the original one in terms of content. Yet, on a re-index, the content that has been changed will be detected and another ranking algorithm will be applied. The use of this technique might lead to Google penalization.