Matt Cutts, head of the Google’s webspam team, details in a YouTube video how the search engine giant thoroughly scours the web on a daily basis to provide the most up-to-date results to users.
Google launched this site ‘How Search Works’ a little less than a year ago, although Google crawls the web on daily basis, that wasn’t always the case. “We used to crawl for 30 days… and then index for about a week and push that data out — and that would take about a week,” Cutts said. “Sometimes you would hit a data center with new data and sometimes you would hit a data center with old data.”
Web Developers and Web Designing Companies have been collaborating to try and combat spam with various methods for years. One method that is being used nearly unanimously by webmasters is the CAPTCHA which stands for- Completely Automatic Public Turing Test to Tell Computers and Humans Apart.
Some captcha are really hard to decipher, it looks like a child had written something with an ink-starved pen and then left the piece of paper out in the rain, quite artistic. If you try to attempt that code surprisingly it will be thrown back with an “incorrect code entered message”.