What is the tourist scheme in Thailand?

Excuse me, could you please elaborate on the tourist scheme that Thailand offers? I'm particularly interested in understanding the details of this program and how it benefits visitors to the country. Is there a specific visa category associated with this scheme, or does it include discounts or incentives for tourists? Also, are there any specific requirements or qualifications that need to be met in order to participate in this program? I'd appreciate any information you can provide on this topic.