How Do You Know Which Are the Best Book Marketing Services

Hi everyone, I have been researching the best book marketing services, but it’s confusing to figure out which ones truly help a book reach the right readers. Some authors recommend social media campaigns, while others swear by email outreach or engaging with reader communities. I am curious what book marketing suggestions have genuinely worked for you I would love to hear honest experiences and tips from anyone who has tried different services and seen real results promoting their book.