With Dynamic Tag PHP you can pull values from the database using PHP or simply use PHP to insert the values.
You can echo/return any string, for example, "Hello World!"
You can retrieve the ACF field value
or simply
You can use all possible conditions.
Insert Image with Return as Data
To insert the image, enable the "Return as Data" toggle, use return instead of echo, and return the image inside such an array like in the example below:
return [ 'url' => 'https://.../example.png' ];
Date
You can use the PHP date function to print the date
As such, there are many possibilities with Dynamic Tag PHP.