"Take nothing personally", is a principle that guides or suggests not internalizing the actions and words of others. In other words, it emphasizes the detachment from the opinions and behaviors of others.

It allows you to maintain emotional balance and helps you to focus on your well-being.

Simply it is all about understanding people's actions and their words often stem from their own perspective, experience, and emotions rather than being a reflection of your worth or value.

It is often easier said than done. The best way to understand someone is to try to see things from their perspective and consider their point of view. Alternatively, recognize that their actions may have nothing to do with you.