WordPress has become an important tool needed by programmers. Compare it to static website  where development used to be tough , you need design website in Photoshop and them html . For editing download software like Dreamweaver and all and them amend them. A normal / layman user can not do all those things.

Then comes word press as Blog but later on everyone started using it for website , as lot of third part ready made designs had made life easier.

To bring it on for a better functionality , programmers are making plugins to make it more easy for a general user. As soon as one install word press there are some plugins which we can install as free and are going to give us benefit to us and our website.