One reason why I like duckduckgo over the other search engines is that they do respect privacy of searchers. They do not track and record the activities of browsers. That said, searchers will not leave any footprint when doing a search in duckduckgo. Unlike Google and Bing, this search engine doesn’t know how the searchers are and there is no way to tie their searches together. Imagine when you search for something that you don’t want others to know, do you feel comfortable if somebody track your search history?
Think twice before doing any search in main SE!