Search marketers should pay attention to digital permissions such as mobile and social opt-ins, including Like-gated Facebook pages, to maintain a trusted relationship with consumers. Kane Russell tells us why these digital permissions will become more important and how social differs from mobile, and reveals ways to implement them and the technology behind opt-ins and compliance. 

Bill Slawski looks at Google's Information Retrieval -- based on historical data -- a patent granted in 2008 that takes advantage of recording continuous changes to a site. The patent focuses on two goals -- to help identify Web spam, and to avoid stale documents being returned in response to a query. It raises questions such as how important the age of domains and links has become, and whether Google favors fresh content sites over others. Other considerations include the weight of Web sites on rankings, and when someone new purchases a Web site and makes changes does the PageRank for that site start to …

Bing's Duane Forrester joins Rand Fishkin this week to talk about the search engine, shutting down Yahoo Site Explorer, early stages of social search, return of the meta keyword tag as a spam signal, and some new features in Bing Webmaster Tools and how data fuels the features.      

Voice search continues to gain attention, but marketers need to remember the technology remains in its infancy. Gary Stein tells us a story about an expereince with voice search in a crowded and noisy restaurant with a friend. One had in hand an iPhone, and the other an Android. After drinking a few cocktails they asked the phones some questions like "who was the 12th president," giving both phones commands to send texts. The Android performed perfectly. The iPhone struggled a bit and came up with a couple of nonsense answers.  

Microsoft's Bing search engine now supports search across applications in the Xbox, but Matthew Moskovciak questions whether it can solve the problem of video search across the mounds of available content. He tells us that after being on the market for nearly a year, even Google TV fails to effectively search Netflix results. Moskovciak not only lays out the problem, but presents solutions and points to Clicker and Fanhattan as two possible choices. He also tells us about Microsoft's forthcoming dashboard and when we can expect it.

Data can help marketers make better decisions on allocating budgets, so Neil Patel provides a checklist of metrics. The list ranges from customer acquisition costs to retention to churn to activation. Patel tells us how to calculate CAC cost and provides insight on retaining customers, among other tips. He also recommends that marketers start small and slow, and focus on those factors that most influence the bottom line.

Apple has stumbled onto something other than hardware. Historically, SEO presents an acronym for search engine optimization. But since Apple launched Siri, Crispin Sheridan beleives the tech industry should consider another meaning. He writes that it's worth considering how people use Siri engine optimization and begin to look at new forms of SEO. He suggests that marketers consider how Siri will influence optimization for local search, schema tags for structured data, and longer-tail keywords. 

Google has made significant changes to the way secure search works for signed-in users of its services. Jonathan Allen tells us that all users who sign in are redirected to the Google Secure Search site. They will have their searches encrypted and secure searches that lead to clicks in organic results will not pass the query string. He tells us to follow Twitter's and Facebook's lead to maintain a commitment to the Electronic Frontier Foundation. The detailed post explains how this will influence searches, and discusses the "uproar" from the SEO community. 

Just when you think you've seen it all, MC Hammer announced a "deep" search or "relationship" search engine called WIREDoo at the Web 2.0 Summit. It's not a competitive attempt to recreate search, but to make it better, according to Hammer. It relies on relationships beyond keywords. Hammer is not a newbie to technology, and listening to him talk about search engines makes you believe he's onto something. 

David Harry looks at how personalization influences SEO. He breaks the post into three key areas, and provides a list of topics that feed into the decision of what goes into personalized results. He attempts to provide a deeper understanding of search, information retrieval, and the SEO landscape through tips on traditional search personalization, geo-localized personalization, and a better understanding of the role of personalization of SEO in the user experience.