In addition to publishing fresh content, another tried-and-true SEO tactic was given an added level of importance as a result of Google’s ever-evolving algorithm—implementing microdata in a site’s HTML.

Personalized search results just got more personal with integrated social sharing. But do you want to see your friend's posts in Google search results?

The end of another era in Yahoo Search. I received an email at the beginning of September informing me that the Yahoo Ambassador program was being discontinued. Similar to Geocities being removed from the index, this marks another milestone in the evolution of Search.

Google Instant, a new search enhancement that shows results as you type, was launched today for users searching while signed into their Google accounts. We review the benefits and potential implications to paid and organic search.

Domains are, and have been, an incredibly important aspect of a site's ability to appear in search results. Having a "good" domain can go a long way towards helping your site not only appear at the top of related searches, but also appear quicker than "bad" domains.

It is being widely reported that the update to Google's search algorithm and index, name 'Caffeine', has been deployed.

This week, Bing made several updates to their search results as part of a larger attempt to compete with Google's functionality including enhanced search results, Facebook integration and Wolfram Alpha calculations.

First and foremost was the announcement that Google has acquired AdMob, one of the largest mobile ad networks, in an all-stock deal valued at $750 million. AdMob currently serves up 10 billion monthly ad requests. Combined with the massive AdSense assets, this will make it the market leader in mobile in a big way.

It's truly an end of an era. Geocities, the free web hosting service that Yahoo purchased in 1999, has officially been removed from all the major search engines. Millions of pages, millions of neighborhoods, millions of links -- poof -- have vanished with nary a trace.

One of the best things about the world of search is that the only constant is change. And so we thought that today we'd identify a few of the changes in two of the search engines out there.