Goodreads book giveaway... Assuming you are doing the digital giveaway, don’t do it.
It’s a mixed bag at best. yes, lots of people wil sign up for a free book giveaway, and it looks good on the Goodread stats, but these peoplesign up for every free book that comes down the GR pipeline, so, when Amazon gives them away Amazon’s algorithm will attach your book to every other book that was given away to these people across every conceivable genre.
What happens next? Any email promos Amazon does with your book can go out with your book surrounded by... oh... self-help books. whatever, it can get crazy.
It’s a very mixed bag of pros and cons. Even a Bookbub promo will mess with your also-bughts, but nothiing like the GR giveaway.