This plugin is replaced entirely by layout card
On to something a bit more hands-on:
It is a well known trick (mentioned in the docs to create a header on a lovelace view by using
The problem with this approach is that anything below the header is locked in position by the stack. You lose lovelaces ability to adjust for wider screens. The column card fixes this.
Here are two screenshots from my configuration, showing the same view with my phone held in portrait and landscape mode respectively:
Note how the header stretches across the entire screen, but the cards below move to either below or beside each other depending on the available space.