While some choose to avoid treats altogether, giving your cat treats daily is more than okay. The only requirement is that it makes no more than 10% of the total calorie intake in a day. They can become fussy eaters if they get easy access to treats.
We all know how cats love chicken and meat. Anything with meat should be irresistible to cats. Therefore, if you are looking for treats that your cat can't avoid, buy one with chicken, beef, turkey, etc. but consider your cat's personal preferences as they might differ.
Cats are carnivores. You can give them salmon, chicken, beef, or meat as treats. But make sure that the fat is removed and that you are giving the treats within limits. Cats often also like bananas, cheese, carrots, and rice.