The World Wide Web (WWW) or web is the actual content found in this huge network, which is stored in the form of numerous interlinked web pages.
Internet is a computer based world wide communications network, whichi is composed of large number of smaller interconnected netoworks. Eg Web Email, social media etc.
While internet is a collection of computers or networking devices connected together, WWW is a collection of documents, linked via special links called hyperlinks. WWW form a large part of Internet but is not the Internet.