Question

what is publicity? why we publish anything​

Answer 1

Publishing is the dissemination of literature, music, or information. It is the activity of making information available to the general public. In some cases, authors may be their own publishers, meaning originators and developers of content also provide media to deliver and display their content. Also, the word "publisher" can refer both to an individual who leads a publishing company or an imprint and to an individual who owns/heads a magazine.

Answer 2

publicity is just one aspect of public relations publicity concern a company, organisation or presence in the media

that's by we publish anything we can easily understood