Yes sauerkraut is very good for your stomach and helps improve your digestive health.
Eating sauerkraut that is non pasteurized is the best as it contains live and active probiotics that are beneficial to your stomach and digestive health.
If you have acid reflux the sauerkraut can also help with that as well and your digestion should improve as a result of eating sauerkraut.
Sauerkraut also feeds the good bacteria in your gut and helps reduce inflammation.
Eating sauerkraut daily is okay as well but you don't have to eat sauerkraut everyday to get the health benefits.
Eat the sauerkraut as often as you would like to and your health will improve.
If you want the best health benefits from sauerkraut get non pasteurized sauerkraut or make homemade sauerkraut that is not pasteurized as pasteurized sauerkraut does not contain the live and active probiotics.