On the request of a Twitter tweet, Adam Audette lays out the correct SEO method to handle product versions, colors, sizes and variations on ecommerce sites. He provides a few example questions to ask before getting started, and tips on tools to use. He suggests basing all decisions on analysis, such as the site’s strengths, weaknesses, and obstacles, as well as business objectives and SEO goals.

Retargeting highlights the positive, but can distract from the creative piece. It also can lower CPAs and increase conversions, but it won't fix a bad marketing strategy, according to Marty Weintraub. He provides tips on remarketing, along with 14 other truisms that paid-search marketers should tell their clients, such as the opportunities for early adopters.

Companies expanding into new countries might want to think about launching a new Web site, but there's always a risk of losing significant traffic when restructuring the site, according to Steven Macdonald. He provides two views on how to minimize the risk of losing traffic from search engines when launching a new Web site. One way could mean forfeiting 35% of organic traffic loss from search engines, while the other could be a mere 4%.

Vincent Wehren tells us how to verify that a bot crawling a Web site is really from Bing. He explains the steps to take, such as performing a reverse DNS lookup using the IP address from the logs to verify that it resolves to a name that ends with search.msn.com. Then do a forward DNS lookup using the name to confirm that it sends the information back to the same IP address. Wehren provides screen shots and code to help identify the process, along with tips on what not to do.