What are "transistors" and "chips"?

[Annaaa]

I often hear these two seemingly high-tech terms "transistors" and "chips", but what is embarrassing is that they are not always clear about what they are, what role they play, and in which areas and equipment will they be used? Thank you very much. .
I don't understand these terms in English articles. So I don't understand too much. I have to work hard. I want to know some basic introductions that are simple and easy to understand. Thank you.