Praxis means practice (Greek etymology). Praxis is about putting things into practice, walking the walk, practicing what you preach. The opposite of praxis is sedentary hypocrisy.
Praxis is also about practicing, over and over. Trying things out for yourself and seeing if they work. Not giving up right away, or maybe ever.
Nothing will get done if nobody does anything. Praxis is doing the thing instead of just talking about doing the thing.
Doing. Getting it done.