Some think an introvert is a shy person or anti-social. That's a misconception.
I am an introvert and very social and consider my self a connector. However I need to be alone before and after socializing to recharge, to be fully present and comfortable while talking to people.
I do workshops all the time presenting to large audiences and I'm comfortable doing that. After the workshops, I need my alone time in a quiet environment with no stimulations to recharge.
According to Susan Cain: Introverts have a preference for a quiet, more minimally stimulating environment. Introverts tend to enjoy quiet concentration, listen more than they talk, and think before they speak, and have a more circumspect and cautious approach to risk. Introverts think more, are less reckless and focus on what really matters—relationships and meaningful work.
Conversely, extroverts are energized by social situations and tend to be assertive multi-taskers who think out loud and on their feet.
In a nutshell introverts recharge by being alone. Extroverts recharge by being around people and stimulating environments.