Advanced Search Operators and SEO - Using Date Indicators

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If you go to Google's advanced search you can set search results to specific discovery dates (click on Date, usage rights, numeric range, and more). Discovery date can help you identify the rate at which a web page is indexed. Index date and crawl rate are different. Crawling is the process of getting copy of the page, while indexing is concerned with the processing and ranking of pages. Indexing is a lot more  complex than crawling, and takes more time.

You can set time filters in advanced search options and monitor how often site pages get indexed. If the indexing rate is once in a few days, then the site is deemed important by Google, and getting a link from it is worth the money and/or effort.

Also, please keep in mind that toolbar page rank is not real, so SEOs use the cache date and indexing rate to determine the value of pages.

Yahoo Edu and Gov Search

• Yahoo advanced web search

Yahoo doesn't have many date range options, but it has a neat Site/Domain filter. You can filter by .com, .edu, .gov and .org domains. Of most interest are the .edu and .gov domains.

The down side is that it doesn't work well in countries other than the US. For example, Yahoo's Canada version only gives .ca, .com, .net, and .org filters. The Canadian government domains use gc.ca, and many universities are camping at .ca.

To find government and university domains in Canada (or other countries), use the commands described above. For example, intitle"Canada government" or something similar.

I hope this was helpful. Check the articles in the bibliography for more useful search engine optimization commands.

Bibliography

• Google search basics: More search help

• Evan Carmichael on Google's advanced search operators

• SEO Moz looks at keywords from every angle for research data

• Another look at Google's advanced search operators

• Link building secrets, a PDF that also talks about using the advanced operators

• Another guide to Google's advanced operators

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