This search command works the same like Allinanchor and Allintitle. When using Allinurl, the user gets a list of websites, where the keyword can be found in the URL. If the user enters more than one word, sometimes it might happen that the search engine finds the whole term in a URL. The positions in the list of the results will be calculated by the occurrence of the keywords in the URL. This tool has an advantage for SEO, because it informs you about your concurrent firms.