By default, your posts always show the date they were originally published. But if you’ve updated the post since then, it’s helpful for your visitors to know that, too. Google engineer Gary Ilyes recommends doing this.
I’ll adjust your post dates so that if you update a post more than one week after the original date, we’ll show that too (we can adjust that timeframe to your liking). This will happen automatically – no shortcode or any additional work on your part necessary!