Rand Fishkin and Ben Hendrickson to answer many questions about latent dirichlet allocation (LDA) and SEO, two topics floating around the search community. The two attempt to define the geeky LDA model in simplistic terms by delving into concepts like "on page" and "keyword density" to outline the impact LDA may have on the SEO industry.

When optimizing a Web site, don't forget it's the personal recommendation that gets the attention of consumers, according to Scott Gould. In a world where there's so many choices, he explains SEO helps optimize sites, but getting the person to search for the product or service becomes the first challenge. SEO professionals need to remember the world continues to move toward a pull, rather than push mentality. So, Gould provides tips and insights to help consumers find the goods and services through recommendations.

Peter J. Meyers, aka Dr. Pete, serves up some tips on putting three SEO tools to work on the cheap. They include Five Second Test, Crazy Egg, and UserTesting.com. He estimates the total cost to do one round of tests at $224. Parting with money isn't easy, he writes, but the insights gained from spending just more than over $200 will easily yield 10 or even 100-times back in online sales improvement.

Google Instant has made the long tail more important to search engine optimization efforts. And despite concerns that this change is a headache for SEO experts, Andy Beal believes Google knows the average person searching online will have a lot more fun searching. More fun means longer searches with greater detail.

If there's something to say, the SEO community can pretty well count on Rae Hoffman to step up and say it. You go, girl. Hoffman sets the record straight on blunders being reported about Google Instant in regards to SEO. She writes, "All that has changed is that Google has launched a shiny new feature that changes the fact that you need to type the ENTIRE search term in and hit the enter button to get results."

Halloween, becomes a strong season for retailers offering party and craft supplies, cards and gifts, as well as those catering to the occult. This year, Halloween falls on a Sunday, so there's sure to be parties the night before. Tina Kelleher provides tips to boost paid search campaigns and explains how to get a seasonal lift in traffic during the weeks leading up to Halloween.

Neil Patel believes he's found the secret to boosting search traffic through SEO, so he's outlined basic guidelines on finding the correct keywords, crafting the content, optimizing the code, and gaining the links.

Developing a paid search plan takes work because there are many nuances to consider. Erin suggests that before you get started researching keywords and writing ads, ask the client key questions to map out the landscape and develop a business plan.

On the SEO Dojo Radio podcast, David Harry and cohorts talk about whether Google Instant makes SEO dead or irrelevant and how it changes search. Harry believes many SEOs will likely want to start using Google Instant for keyword research, but reminds SEO professionals that the results are skewed based on personalized search. Harry and friends also discuss SEOmoz's latest LDA tool and welcome Debra Mastaler to talk about link building.

Aaron Wall breaks down the wall to interview Rand Fishkin. Wall grills Fishkin about his SEO background, take on the industry, and where the two have differing opinions. In this very long interview, they also talk about a controversial topic emerging among SEO professionals known as Latent Dirichlet Allocation (LDA).