Mindfulness means being more aware of your experience as it happens, with an attitude of openness and friendliness. So as you are reading these lines you can feel the contact of your feet with the floor, and be aware of the weight of your body. But most of the time we live in autopilot, either dwelling in the past or worrying about the future: on average, we spend 46.9% of our waking hours thinking about something other than what we are doing, and this can have an emotional cost.
The good news is that mindfulness training rewires your brain to be more focused on the present and turn down the inner critic. Neuroplasticity of course does not happen overnight, and that is why it is key to establish and sustain a regular mindfulness practice.