fix: clarify readme instructions

Author: lwasser

README.md

@@ -53,16 +53,16 @@ For MAC:
 Linux:
 `sudo apt-get install imagemagick`
 
-You can convert a directory of PNG images associated with a
-blog post that you write using:
+You can convert a directory of `.png` images associated with a
+blog post that you write using the following bash command:
 
 `for file in *.png; do cwebp "$file" -o "${file%.*}.webp"; done`
 
-or a single image
+or you can convert a single image:
 
 `cwebp input-image.png -o output-image.webp`
 
-Below is an example of adding a figure to a post that has both webp and .png formats to support older and newer browsers.
+Below is an example of how to add figure to a post that supports both `.webp` and `.png` formats. Providing both allows the website to be backwards-compatible with older browsers.
 
 ```html
 <figure>
@@ -74,10 +74,12 @@ Below is an example of adding a figure to a post that has both webp and .png for
 ```
 ## How to update blog post last_updated field
 
-We have a script that will automatically update the last_updated field for all of our blog posts. To run it use:
+We have a bash script that will automatically update the `last_updated` field in the YAML for all of our blog posts. To run it use:
 
 `./scripts/date-updated.sh`
 
+Note: it would be nice to add this into our CI build but right now we do not have that setup. So we just need to run this script periodically to update the `last_updated` field when we update a blog post.
+
 ## Contributors ✨
 
 Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):