Content personalization on the Web means different things to different people. Generally, most marketers think of it as the process of serving distinctive messages and offers to their customers, all in the hopes of making online experiences more specific, relevant and enjoyable. It sounds simple enough. Unfortunately, personalization gets increasingly confusing when one considers all the capabilities and technologies available to help in the process. One expert tells marketers that personalization means incorporating a product recommendation engine; another calls for segmenting visitors into different like-minded groups. Marketers should avoid getting lost in definitions and recommendations, understand that many approaches to site-side content personalization exist, consider each tactic as just one spot on a personalization continuum, and progress through the continuum to continue boosting conversions and revenue. On the "one to all" end of the continuum, marketers offer a single site with no variations. Each visitor receives the same content and promotions. On the opposite "one to one" end of the spectrum, marketers serve unique content and offers to each individual. While most marketers cannot realistically achieve this one-to-one ideal today, many seek to get as close as possible, knowing that conversion rates and revenue improve with each step taken along the continuum. Three fundamental tiers of segmentation can help marketers get more personal: 1. Academic segmentation 2. Pre-meditated segmentation 3. Real time, automated persona segmentation Academic segmentation, the simplest form, consists of random A/B or multivariate testing. Academic segmentation randomly serves visitors varying messages, button colors, page layouts or variances of any other element a marketer desires to test and tracks outcomes to determine the most effective elements. Testing can be applied to any part of a Web site, from the home page to a shopping cart or registration form and virtually any page in between. Academic segmentation helps marketers answer a specific question or determine an ideal design element or workflow. It helps them optimize their site to increase performance but only on a one-to-all basis, applying findings to improve the single experience they offer to all visitors. Marketers can get more personal by applying A/B and multivariate testing in tandem with pre-meditated segmentation. Sometimes called segmented testing and targeting, pre-meditated segmentation gets much more personal by focusing on groups pre-defined by the marketer under any logical classification system. The types of pages users view, the time of day they visit the site or any host of other factors can define these segments. More advanced than a one-to-all approach, pre-meditated segmentation enables marketers to develop and serve messages and offers specifically for different groups, but marketers can take content personalization efforts even further. The ultimate nirvana of content personalization, true one-to-one communication, is only achieved through real time, automated persona segmentation. Already generating impressive results for marketers large and small, automated persona segmentation uses next generation algorithm-based applications. The algorithms tap a vast array of available user data (IP addresses, time of visit, browser type, etc.) to make real time decisions, learn from those decisions and their associated outcomes, and get smarter with every piece of content it serves to visitors. Marketers already using pre-meditated segmentation or those considering their first personalization program can use these technologies to offer highly personalized content and promotions to visitors and improve conversions and revenues without spending much time or effort behind the scenes. Where to focus? Content personalization efforts can flourish on home pages, category and product pages, shopping carts, forms, subscription and registration pages, and just about any other area of a Web site. They can optimize site design and structure, serve up targeted promotions, and better engage visitors. Today's most sophisticated personalization applications help marketers segment customers across the entire personalization continuum. It's never been easier for marketers to effectively personalize site-side content for visitors, but they should remain wary of the many shades of personalization and focus instead on the continuum. Ultimately the same goal remains; achieve an optimized customer experience that results in improved conversions and increased revenues.