I was reading the top answer here:
what do you need to pay for the board of advisors in a startup?
The author was saying:
In general, advisors get something between 0.1% - 1% of the company, vested monthly over 2 years.
I understand the concept of giving 1% of my company to an adviser. What I don't understand is "vested monthly over 2 years". What does that means? I have no idea...