Local search is an important topic as consumers now turn to the web for local information and mobile growth is changing search habits. Key factors for local search ranking by Google include relevance of online content to search queries, prominence of the brand online, and distance of the physical location to the search location. Businesses should claim their Google Places listing, optimize their website for local search, and consider other strategies like directory listings, deals sites, and social check-ins to improve local search visibility. Measuring performance is also important to understand traffic sources and areas for optimization.