What is E.E. Cummings known for in his poetry?

E. E. Cummings is known for breaking away from traditional poetic form and structure. He is famous for his experimental and unconventional use of punctuation and syntax, his non-traditional capitalization and spelling, and his fragmentation and use of spacing to convey emphasis and meaning. Cummings is also highly regarded for his intense imagery, metaphorical language, and his ability to capture the essence of human emotions and experiences. Furthermore, he is renowned for his exploration of themes such as love, loss, identity, the individual versus society, and the nature of reality and existence.