Block templates are one of my favorite new features in Gutenberg. You can specify a list of blocks that automatically appear in the content editor, customize their attributes, and lock the template.
Proposal for Block Templates · Issue #3588 · WordPress/gutenberg
Seems we didn't have an overview issue for block templates even though we have discussed them repeatedly. Definition: In its most general sense, a block template is a definition that includes a lis...
How to Add Block Templates to Your WordPress Theme or Plugin
While working on my Gutenberg Development Course, one of the hardest things I found to research was how to add block templates to your WordPress theme or plugin. Block templates are a way to have c…