What does Gamma measure in options trading?

Which of the following statements is true about Gamma?

What type of risk is associated with a large Gamma?

When are you considered "Long Gamma" in options trading?

Which type of option should be avoided when shorting, considering Gamma?

For which type of option does Delta change most rapidly?

For which types of options does Delta change slowly?

What is the key takeaway regarding shorting ATM or ITM options with the hope they expire worthless?

What type of options are generally considered good candidates for short trades, assuming you hold them until expiry?