First, to tag a blog post by a person you have to have people in the Platform. See our Guide on how to add Staff & People profiles for how to do that.
Why Tag A Person?
When you tag a person to a blog post it will automatically display on that person's profile page. This is a great way to build dynamic profile pages.
Tagging A Blog By A Persons
On the blog post, scroll down until you see the People Section.
Start typing the person's name and the system with autocomplete it for you.
Click Add
You can tag a post by as many People as you'd like.
Click Save or Publish