This is part of the traditions and acts of faith in Thailand. Go feed the monks and listen to the good word.
Concretely, this consists of going to a temple, a day planned for this. Around the temple, there are a few stands that sell food.
You can buy it there, but some faithful bring it from home. Then all the food is placed on a large table.
Everyone will sit behind small rectangular tables arranged like schoolchildren’s tables.
The monks arrive and settle in a row in front of these tables.
Officiants bring and distribute all available food in front of the monks. The head of the temple takes the floor at length.
Then the monks start eating while one of them perches on a "throne" to read kinds of psalms printed on a "stick".
This poor monk will not be able to eat elsewhere. The monks eat for a long time and make provisions, each in his "lunch box".
Then the great monk takes the floor at length and addresses the faithful.
At the end of his intervention, the monks leave, the faithful get up to get the "leftovers" of the monks’ meals. Obviously not the rest of their plates, but the dishes, far too many, that they could not consume.
Https://vimeo.com/813988877
Everyone brings back his "loot" to his table and starts eating.
The ceremony is over. It lasted about 2 hours