SEO techniques are classified by some into two broad categories: techniques that search engines recommend as part of good design and those techniques that search engines do not approve of and attempt to minimize the effect of, referred to as spamdexing.

Spamdexing involves a number of methods, such as repeating unrelated phrases, to manipulate the relevancy or prominence of resources indexed by a search engine, in a manner inconsistent with the purpose of the indexing system.

Search engines use a variety of algorithms to determine relevancy ranking. Some of these include determining whether the search term appears in the META keywords tag, others whether the search term appears in the body text or URL of a web page. Learn more of this with the Search Engine Optimization Philippines.

Content spam techniques involve altering the logical view that a search engine has over the page's contents. They all aim at variants of the vector space model for information retrieval on text collections.

Keyword stuffing involves the calculated placement of keywords within a page to raise the keyword count, variety, and density of the page. This is useful to make a page appear to be relevant for a web crawler in a way that makes it more likely to be found.

Older versions of indexing programs simply counted how often a keyword appeared, and used that to determine relevance levels. Most modern search engines have the ability to analyze a page for keyword stuffing and determine whether the frequency is consistent with other sites created specifically to attract search engine traffic. More information about Keyword stuffing with the Search Engine Optimization Philippines.

Disguising keywords and phrases by making them the same color as the background, using a tiny font size, or hiding them within HTML code such as "no frame" sections, ALT attributes, zero-width/height DIVs, and "no script" sections.

However, hidden text is not always spamdexing: it can also be used to enhance accessibility. People screening websites for a search-engine company might temporarily or permanently block an entire website for having invisible text on some webpages. Visit the Search Engine Optimization Philippines to learn more of hidden and invisible unrelated text.

Creating low-quality web pages that contain very little content but are instead stuffed with very similar keywords and phrases. They are designed to rank highly within the search results, but serve no purpose to visitors looking for information. A doorway page will generally have "click here to enter" on the page. Learn more of ?Gateway? or doorway pages with the Search Engine Optimization Philippines.

Scraper sites, also known as Made for AdSense sites, are created using various programs designed to 'scrape' search-engine results pages or other sources of content and create 'content' for a website.

The specific presentation of content on these sites is unique, but is merely an amalgamation of content taken from other sources, often without permission. These types of websites are generally full of advertising, or redirect the user to other sites. For more information about this, then visit the Search Engine Optimization Philippines in www.myoptimind.com for more details.