Reciprocal linking – Reciprocal linking is one of the off-page (link building) strategies where both involved sites link to each other; reciprocal links were very popular a few years ago, but since then they were constantly devaluated and nowadays they carry only a minimal value if the sites are not related.
Redirect - A redirect is the action of automatically send the visitors to a different web page. The most common redirect codes are 301 (permanent redirect) and 302 (temporary redirect)
Referrer – A referrer is the name given to the source from where a visitor came to a certain source; commonly referrers are sites where a link to the target site are placed or search engines.
Relevance – The relevance of a site linking to a certain site becomes a more and more important factor when counting the value of a back-link; relevant back-links valuing way more than non-relevant back-links.
Resubmitting – Resubmitting a site to a certain search engine or directory is generally not recommended and may even delay the site review. Rewrite – Rewriting is a technique of changing the URLs in order to make them friendlier both for search engines and human visitors (for example a web page named www.mysite.php/index.php?product=bike&model=SH102 can be rewrite to www.mysite.php/bike/SH102.html). It is also called URL rewrite.
Robot – A robot is a program that is used by a search engine to automatically explore the web and download, analyze and save the content of any page it finds. It is also called bot, crawler, or spider. Robots.txt– Robots.txt is a file placed in the root directory of a web site (in the same place with the index file) which instructs search engine robots which pages should not be spidered and indexed. Although using the robots.txt file one can block the access to any file from a site, it is generally used for blocking search engines crawl and index password protected or hidden pages.
Return on investment (ROI) – Return on investment (ROI) is the most popular and accurate measurement unit for measuring the efficiency of an advertising campaign; it is calculated using the following simple formula: return on investment (ROI) = total revenues (generated from the advertising campaign) - total costs (spent for the advertising campaign). However it doesn’t take in consideration some factors that may deliver profit on long term (like generating repeating/loyal visitors, increasing brand visibility, etc) so generally the total profit of an advertising campaign is higher than the raw return on investment (ROI).
