A less tangible level of metadata is Google schema open-graph “markup” which enables you to receive “enhanced features” on google page one
Press releases get posted on our website and get google markup related to
Type
Headline
Image
Date published
Author
And Description
For press release we use the type “news”
The headline is generally the title of the release and we use a URL that points to an open-access image we are writing the press release about.
The date published refers to the date of the press release being published.
For the Author information we use Social Web Branding Consultants and SWB Consultants as the type
We use our Social Web Branding Consultants as the publisher name and the SWB Consultants logo
And we use the same text from the meta description for our descriptions - the first sentence or two of the body texts.