A lot of it is scammy. Not all of it but alot. There are legitimate religious meditative practices that can be called "mindfulness meditation".
The gist of it is it's a type of meditation where you sit quietly, listen to your own thoughts and being to realise that thoughts are just thoughts, they come and go, etc... It's about being mindful of your own psyche as opposed to being distracted by outside factors. Lots of people react to stimuli and blame their mood, thoughts or actions on those stimuli, mindfulness is about being more aware of these things and being able to live life on your own terms instead of merely being swayed by outside influences. Plus other things.
Anyhow, monastics will devote their entire lives to meditation, it goes deep, but that's an attempt at an explanation.
The gist of it is it's a type of meditation where you sit quietly, listen to your own thoughts and being to realise that thoughts are just thoughts, they come and go, etc... It's about being mindful of your own psyche as opposed to being distracted by outside factors. Lots of people react to stimuli and blame their mood, thoughts or actions on those stimuli, mindfulness is about being more aware of these things and being able to live life on your own terms instead of merely being swayed by outside influences. Plus other things.
Anyhow, monastics will devote their entire lives to meditation, it goes deep, but that's an attempt at an explanation.