The usual stock photo workflow is four steps too long: open a site, search, download, find the file, upload it, insert it. Each step is trivial and together they are enough friction that people settle for the first acceptable picture rather than the right one.
This searches Pexels, Pixabay and Unsplash from inside the editor and drops the result straight onto the canvas as a layer. Browsing by category works too, which is often faster than typing, because you rarely know the word for what you want.
Because it is one step, you try more pictures. That sounds minor and it is the whole point: the quality of a design is mostly a function of how many options you actually looked at.
One piece of advice about free stock in general: the most-downloaded photographs are the ones everyone has seen. Go a few pages deeper than feels necessary, and prefer pictures with room around the subject, because those are the ones you can crop for different formats later.