There are a wide number of online dating services to make sure as many people can visit as possible. Usually the website with most visitors is the most popular one and depending on how advanced they are, these websites can assist you in finding your loved one by searching by a keyword or simply looking at different profiles. Some dating services are large and have been there for many years, boasting several million users (the most popular US-based website has nearly 15 million members). However, the success of a certain dating service does not depend entirely on the number of members – such things as convenient search, possibility to create profile with as many options as possible and use of specific criteria turn out to be more important for many users. Some sites can be popular because of their "know-how" – one of the most popular websites of this kind uses special software to give you a list of your most narrow matches. The people suggested by the dating service tend to be quite good mates if compared to the process when members have to search for their match manually. There are a number of websites offer such convenient feature as local search – by entering your Zip code you learn instantly whether any people in your area are also dating online. This allows you to decide whether it's worth paying for the service, as in case there are no people found in your area it may not be so easy for you to meet in real life.