If you want to write a popular novel online, you can refer to the following suggestions: 1. Choose an interesting story to attract the reader's interest. 2. Use your rich imagination to create unique storylines and characters to surprise the readers. 3. Write more and practice more to improve your writing skills and language skills. 4. Interact with readers, reply to readers 'messages and comments, and establish a good relationship. 5. Use various channels to promote your novel such as social media, blog, forum, etc. to attract more readers.