Posts List Block is just that! A block to display a list of your latest posts. It’s most useful for creating landing pages with both static content and posts!
What makes it different from the Latest Posts Block? This question and others you can find answered in the FAQ.
CAN I USE THIS BLOCK IN PRODUCTION?
We’ll be making frequent updates to the block as we flesh out its feature set. You’re welcome to try it, just be aware that it could break after an update.
HOW IS THIS BLOCK DIFFERENT FROM THE LATEST POSTS BLOCK IN CORE?
It adds an excerpt! And meta information! It really is much more useful, especially if your looking for a block that gives readers a better idea about your latest posts than just the title.