Treats are bite-sized portions of any food your dog likes, typically used to reward and encourage good behaviour. Treats can be low value, medium value or high value based on how much your dog likes them. The only way to figure this out is to experiment with plenty of options as each dog may have its preference.
You can use quite a few things as dog treats:
1) Regular food:
A portion of your dog's meals can be kept aside as a reward. For example, Kibble, Cooked meat (minced or shredded), Eggs, etc.
2) Occasional treats:
These are food items that you can give once in a while as treats. The quantities should be regulated. For example, Natural, unsweetened (xylitol-free) peanut butter, plain cheese, curd, paneer, vanilla ice cream
3 )Commercial treats:
Processed or packaged treats that you can buy at the pet store. The quantities of these treats should be regulated. For example, Jerky, Wet food, plain sausages, etc.
4) Dehydrated/Baked treats:
These treats can be made at home or bought. They can be quite nutrient-rich so remember to adjust the quantity of your dog's meal accordingly. For example, any meat/organ can be dehydrated.