A common use case for this tag is if you are building a reusable site (like a Starter Kit) and you'd like
to do something differently depending on whether a package is installed.
Use this as a single tag within an if
statement:
{{ if {installed:statamic/seo-pro} }} {{ seo_pro:meta }}{{ else }} {{ partial:seo }}{{ /if }}
Or as a tag pair. If the package doesn't exist, then nothing between the tag will be output:
{{ installed:statamic/seo-pro }} {{ seo_pro:meta }}{{ /installed:statamic/seo-pro }}
Hot Tip!
You can pass any Composer package name into this tag. It's not limited to Statamic addons.