Webs are beautiful. (I'm sure it is a generic reference.)
The web is beautiful. (I'm sure it is a specific reference.)
The Web is beautiful. (This web refers to the World Wide Web, a specific web in the world. It differs from the specific reference, where the web is only known in the context of the speaker and not for the reader.
In other words, the web should be some specific web, but for the reader, nobody knows which exact web it refers to.
Is this called "particular reference" or is there another name for it?)