is a very popular website builder which powers approximately 30% or around 75 million websites created on the internet. Its ease of use and extensive library of plugins which are compatible with just about any online sevice, is what draws people to their platform. Not to mention that all of their services are free. (Talk about smart marketing). You can set up a site quickly with no knowledge of code or programming and it will look like it was built by a professional.
Here are some of the services that I know of that are offered by Wordpress: Jetpack