What is the difference between token and ICO?

Excuse me, could you please elaborate on the fundamental distinction between a token and an ICO? I'm a bit confused about how they differ in the realm of cryptocurrency and finance. As I understand, tokens are digital assets that represent a certain value or function, but what exactly is an ICO, and how does it relate to tokens? Could you perhaps provide an example to further clarify their differences? Thank you in advance for your assistance.