What is soy lecithin, and why take it in capsules? — Lecitin forte capsules N30 – Realcaps

According to the card, this is a food supplement in soft gelatine capsules with soy lecithin, an additional source of phospholipids: one capsule contains 600 mg of phospholipids, of which phosphatidylcholine is at least 132 mg. For adults, 1 capsule 3 times a day with a meal for 30 days. Why to take lecithin in capsules, the card does not explain.

General information (not a manufacturer's instruction): lecithin is also found in food; the supplement does not replace a varied diet.