Using Canva to Make Promotional Images

I recently read professional marketers suggest having 5-10 promotional images per book. That means I have a ton of work to do! Since my first published novel, Verity and the Villain (formerly known as Stealing Mercy) will be free starting tomorrow for a few days, I decided to get to work.

I use Canva to make my graphics, but I believe there are many online sites that do the same thing. I like Canva, and it's free.

Which one do you like best? Why? Which do you think will be the most effective?

You can get your FREE copy of Verity and the Villain here. (It's always free in Kindle Unlimited, and free for everyone else June 24-28th)