Mindfulness is used in many contexts nowadays and there are many different understandings of the term. What is it? It is our attention to the present experience of the moment with open curiosity and a willingness to be with what is.
When you are mindful, you are aware of both your external surroundings and your inner experience, including your own responses to what is going on around you, particularly in the present moment. The goal of mindfulness is to become aware without becoming attached to anything you are experiencing. It requires a certain amount of self-discipline to focus only on the present moment.
Therapeutically, mindfulness makes people feel better by slowing things down. It could make you feel better by allowing you to start noticing many wonderful sensory experiences that occur in everyday life that we often do not notice. It is typically done via various grounding techniques, breathing exercises and meditation. Although, mindfulness finds its origins in Buddhism, you do not have to be religious to practise it. It is not achieved over night — think about going to the gym and training your body; only here you train your mind.