Not only can you convey your novel's mood and tone through funny book memes, but you also get to share your personality as as author.
They're easy to find, often easier to create than a book trailer or other marketing content, highly shareable and are instantly recognizable on virtually every social channel (especially #BookTok). When it comes to the author and book-loving community, funny book memes are even more useful for connecting writers and readers. If there's one thing users of the internet everywhere can relate to, it's memes.