Every website has a robots.txt; this gives robots/crawlers/spiders a bunch of rules to follow, such as where they can/can't crawl, and the pages they can/can't index. You can check whether a URL is blocked by robots.txt with Google's Robots Testing Tool. Wiki software allows multiple users to add, delete, and edit each other's Web content quickly without much technical knowledge, making wikis especially useful. In order to get the most success with search engines, you need to speak their language. They don't care how pretty your site is or how much blood, sweat, and tears went into creating it. Sad but true. However, they do care about the keywords you use on your web pages so make sure you use them properly. Weave them throughout the text in a natural way and use variations just to cover the entire basis. At the heart of your local SEO campaign will be building the number of listings you have. In other words, the amount of places you can add your business, and get a citation. Often it is assumed that only business directories count, but actually there are number of ways to expand your portfolio. When a word can have several meanings, like penguin, a semantic system evaluates the meanings of other words in the query.