What's the difference between Firebase hosting "site" and "target" when sharing resources between multiple sites?

Question

I need to deploy multiple sites sharing the same Firestore resources.

In file firebase.json I can use the hosting section:

"hosting": {
    "site": "mysite1",  // change this to mysite2 for another site
    "public": "dist",
...

What are the differences in using a different target instead of site?

"hosting": {
    "target": "mytarget1",  // change this to mytarget2 for another site
    "public": "dist",
...

EDIT

Some links for target mode:

• https://firebase.google.com/docs/cli/targets
• https://firebase.google.com/docs/hosting/multisites#define_hosting_config

Answer 1

Following the second link, you can read

Important: Using deploy targets is the recommended way to configure deploys for multiple Hosting sites. If you previously configured your firebase.json file by explicitly referencing your site-name, you should edit your firebase.json configuration and your CLI commands to use deploy targets instead.

So, implicitly it speaks about a site-name configuration, it is the site: version, probably obsolete now.