Websites that are made without the use of any CMS require the use of various technologies for the creation of a fully functional option. Some technologies require a lot of technical competences and are difficult to work with in order to integrate them in an already existing project.
Usually we enter "keyword" or "terms" in web search engine (google, yahoo, bing, etc.). But then what if we have an image, and we would like to search the web pages or web sites that contain that image (or similar)