If you take Glucophage/Metformin...how were you instructed to take it?

I am getting conflicting views, both online and first-person, on when to take it….Before, during, or after meals?

The timing of this medication getting into your bloodstream is crucial, you’d think there’d be more specific instructions!

Any straight-from-a-professional info/ personal experience, guys? (I’ve read everything on the internet, no need for links)
Thanks!