What is a share?

A share is a part of a company. If I start a company, I can sell small parts of it to people. A share is one slice of a pizza. You can buy as many slices as are available.

We'll think of a share just as a thing that we can buy and then sell to others.

Company A makes bicycle parts.

Company B is an online shopping site.

Company C is a software company.

If these companies are on the share market, we can buy and sell their shares in the same way we buy and sell pizza slices.