It allows you to practice self-discovery

Spending time alone allows you to focus on your own needs and interests without having to worry about impressing others or meeting their expectations. It may be a means to try new things, learn about topics that interest you, gain information, and even experiment with new methods of self-expression. Allowing yourself alone time allows you to explore these subjects without the demands and judgments of others. Taking time for oneself is essential for personal development and progress. Instead of caring about other people's needs, interests, or opinions, alone time allows you to focus on yourself.

You have no one to answer to when you spend time alone: you may take your time and do things at your own speed and in your own way. You can discover a new hobby or skill if you follow your own path, which is great for confidence building. Of course, getting to know oneself better is an important step toward being able to work and live with others more effectively.