Wordsworth's What Is It has become a theoretical guide to English romantic poetry creation.

It promoted the innovation of English poetry and the development of romantic movement. Wordsworth promoted the innovation of English poetry and the development of romantic movement, and became the theoretical guidance of English romantic poetry creation. 1September 798 to1spring 799, Wordsworth and Dorothy went to Germany for a short stay, wrote a series of poems such as Picking Dried Fruits, Ruth and Lucy, and began to write a long poem "Overture".