A personal assistant is like having a grown-up helper who does things for you, just like how your mom or dad helps you with things you need to do. But a personal assistant is someone who helps grown-ups like your parents with important things they need to get done, like organizing their work schedules or helping them remember important dates like birthdays or anniversaries.
Just like how your parents tell you what they need help with, grown-ups who have personal assistants also tell them what they need help with. Personal assistants can do lots of different things to help make a grown-up's life easier, such as scheduling important appointments, answering emails, or even running errands like going to the grocery store.
But instead of having just one personal assistant, some people now have a special device like a phone or computer that has a digital personal assistant. This is like having a little robot helper that can do the same things a human personal assistant can do, like setting reminders, making phone calls or sending messages. You can talk to it and ask it to do things for you, and it will try to help you as best as it can.
So in short, a personal assistant is like a grown-up helper who does different tasks to make their life easier, and nowadays you can also have a digital version to help you with your day-to-day tasks.