Define revenues, writing assignment help

Can I get some help with these questions?

In your own words, define “revenues”. What can we learn about a business by looking at its revenues?

Explain how revenues are different from gains. Are revenues or gains more important to a business?

Does revenue recognition vary from one industry to another, or is it the same for all industries?

What incentives does someone have to change the recognition of revenue? Why would they do so?

Thank you!