The reason why you put salt in water when boiling potatoes is because the salt helps to season the potatoes from inside out, as potatoes dense starch cells absorb the salted water as the potatoes cook.
Salting the water for boiling potatoes also is the best way of flavoring the entire potato, because any salt that is added after cooking the potatoes will only season the surface of the potatoes.
Also salting the water when boiling the potatoes also can result in a creamier texture and crispier exterior when roasted, but the main reason for salting the water before boiling the potatoes is to avoid bland potatoes.
Salting the water when boiling potatoes also helps the water move into the potatoes when boiling as the water molecules will migrate to a greater concentration.
Soaking potatoes before boiling the potatoes also helps when boiling the potatoes.
When you soak the potatoes before boiling the potatoes, it helps the potatoes cook evenly and prevents the potatoes from developing a gummy texture by rinsing off excess surface starch.
Soaking the potatoes before boiling the potatoes is also helpful if you peeled the potatoes and cut the potatoes ahead of time to prevent the potatoes from turning brown.
Although if you want the potatoes to have a richer potato flavor, then it's better to scrub the potatoes and then boil the potatoes in stock or milk instead of soaking them in water.
This is because the water can cause some loss of some of the potatoes nutrients.
Soaking the potatoes and rinsing the potatoes also rinses away excess starch, which can prevent a sticky or gummy texture and can lead to a more evenly cooked potato.
Soaking the potatoes also keeps the potatoes from browning and so if you peel the potatoes and cut the potatoes in and, soaking the potatoes in water keeps the potatoes from oxidizing and turning brown before you cook them.
Soaking the potatoes also allows for meal prep and allows you to get a head start on your meal preparation by prepping the potatoes hours or even a day in advance.
Soaking the potatoes is mainly beneficial for boiling the potatoes or removing starch.
Although soaking the potatoes is not a necessary step for all cooking methods.