What are the details of AIS's free COVID/travel insurance offer for roaming package customers?

AIS is currently offering free COVID/travel insurance to customers who purchase their roaming packages. This offer is primarily aimed at those traveling from Thailand or returning to Thailand. However, it's important to note that the insurance is available only to Thai nationals, foreigners with Thai work permits, and those with Thai residency permits. There are requests for more information or links to the offer in the comments.