Head covering for women - source and explanation

I don't understand why women have to wear a headscarf after the wedding; I'd love to hear an explanation of this and to see some sources

Dear …!

The source for the obligation to cover the head of a married woman is from the Torah, from what is said about a woman suspected of fornication: "and exposed the woman's head." The sages derived from this that until then her head was covered.

In the Talmud it states that according to the Torah law it is sufficient to cover with a "kalata", which is a kind of straw covering that covers only the top of the head. Hair on the sides of the head remains exposed. But the sages added an obligation for a woman to cover her hair completely.

According to letter of the law, covering is obligatory only in front of strangers, and not at home when she is alone, or in front of her husband when she is pure. But even according to halacha, it is a great virtue for a woman to keep her head covered at all times. The Talmud illustrates this with the story of Kimchis, who kept her head covered at all times.

According to the words of the Holy Zohar, covering one's hair everywhere and at all times, [except where necessary, of course], is a cause for abundance and a great blessing. And vice versa...

Therefore, it is the custom of all God-fearing communities everywhere that women keep their heads completely covered.

The main reason for the halachic obligation of head covering is that a married woman must be more modest than a single one, since she has a husband and is forbidden to other men.

Covering the hair expresses extra modesty, and is beneficial for creating a barrier between the woman and men outside the framework of marriage.

Numbers 5:18, Ketubot 72, Terumas HaDeshen, ch. 10