Pratyahara means halting or withdrawal of the senses from the objects of the senses.
It is the control of the five senses, the withdrawal of attention of the mind from external stimuli and turning towards the inner world, so the mind becomes master of the senses.
To master the senses and achieve moderation (mainly on abuses) when it comes to pleasure, it is necessary to control the mind.
Sight and hearing are the two main senses by which we perceive the majority of external stimuli and if consciously controlled is an important step toward peace of mind.
Pratyahara can practice cultivating discrimination and rationalism. E.g. choosing foods with value without allowing the sense of taste to dominate our choices.
The ability of discrimination should be a consultant and guide us to increase our consciousness.
The Pratyahara strengthens confidence, self-esteem and makes us capable and increases self-discipline to resist the destructive tendencies or moments of mind.