With Google's Enhanced Campaign migration deadline looming, there is no better time for some spring campaign cleaning. Kevin Lee serves up some spring cleaning tips to get campaigns in top running order for Bing and Google -- even for Google AdWords campaigns already moved to Enhanced. Lee starts with finding the 404 errors and duplicates, and moves on to optimizing non-standard or missing tracking codes, poor landing pages, and smartphone-specific campaigns. He provides insights to clean up and optimize campaigns in each one of these steps. Read the article here.

Eric Schmidt wonders in a hundred years whether people will look back and "marvel that we allowed humans to drive cars." At Google's annual stockholder meeting this week, it became obvious that geolocation services and Google Maps make driverless cars possible, which is why the platform has become an important technology for the company. The new Google Maps will allow each person to have maps built for them that include friends' recommendations and places they have seen, complete with 3D modeling of places like Saint Peter's Basilica in Rome. Other insights also emerged, such as privacy concerns related to cameras …

Gaining profitability through AdWords campaigns requires skill and knowledge, so Phil Frost takes us through the process for Google AdWords, beginning with a checklist that includes verifying customer demand for the product or the service. He also tells marketers it's important to understand basic math to calculate maximum cost per click and estimate conversion rates, as well as understanding the nuances of creating compelling ad copy. Frost points to tools that will help determine the demand for products in search queries. Obviously, consumers only search for products if there is demand. He also reminds marketers not to make the Web …

Flingo, an interactive TV company, named former Google AdMob exec Jackson Huynh to chief operating officer. Huynh will take responsibility for expanding Flingo's Samba TV platform services, which today enable advertisers to build a direct relationship with viewers by synchronizing media on TV, as well as on second-screen devices like tablets or smartphones. The data allows advertisers and content providers to make available and match related content for consumers.

Google introduced a Content Experiments API Tuesday that integrates with Google Analytics. The tool allows developers to test content on their site with programmatic optimization tools. The API makes Google Analytics a "full-blown A/B testing platform where developers of all types can leverage the power of Google Analytics to run their experiments." Developers can test changes to content without redirects, server-side items like database queries, as well as test in non-Web environments and with the developer's own variation selection logic.

While there has been a lot of discussion around Google Glass privacy issues, one Georgia Tech professor who has been building head-mounted computers since 1993 believes people will soon "crave" the "ultra-fast communication" that Google Glass makes possible. In 2010, Google hired Starner to take the technical lead on Project Glass. The glasses need improvements, he said, but it's like having a second screen in front of your face.

Google product listing ads (PLAs) continue to take more space on the search engine results page (SERP). Larry Kim calls them "commercial intent-sucking monsters" that "steal conversions from both the organic and paid search results." A screen shot demonstrates his point. While PLAs make it easy for consumers to convert and make a purchase, many consumers are likely to be in the research phase and want to see more than one option or have less commercial intent, as Kim puts it. He believes it's Google's way of creating an engine where brands must use AdWords to compete in search, rather …

Glenn Gabe tells us how to check the status of a Google Penguin link. He explains that "when analyzing the link profiles of Web sites hit by Penguin 2.0, you can clearly see unnatural links pointing to deeper pages on the site, and not just the homepage." And it's happened on nearly every Web site he analyzed. Gabe takes us through the process to dig deep to finding the links and remove them. Read the article here.

Sam Owen explains how Sitelink statistics can teach marketers about user behavior. Marketers can find the new tool in Enhanced Ad Extensions. It will help generate data and insights that Owen explains through screenshots. He tells us that while some Sitelinks are not clicked as much as headlines, they do provide additional click-through rates and conversions.

Losing and regaining customers in a multichannel world can become daunting. Courtney Eckerle tells us how online apparel company Shirtmagic, which lets people design custom shirts, remains close to consumers and encourages them to return to the site to purchase their design. Incentives play a big role. Read the article here.