Multiple Installation of wordpress-Plugin use Help

Hi,
I just want to know 2 things regarding wordpress seo plugin.
1. I have multiple wordpress installs like
domain.com/wordpress1
wordpress2.domain.com etc
So,should I use SEO plugin separately on each wordpress installs?

2. Is your WordPress SEo plugin WordPress multisite compatible? I mean can I network activate it for my members of sub-sites to use your plugin? My multisite is an sub-domain install.
e.g — usersite.mydomain.com
user2.mydomain.com

Now the thing is both of the above use different wordpress installs,how do I manage my site wide seo with your plugin? Any Help/advice will be appreciated.

Thank you.

https://ww.wp.xz.cn/plugins/wordpress-seo/