When it is necessary to say “Shabbat Shalom”, how to correctly answer, what does it mean …

This is a Saturday greeting in Hebrew. Friday night and Saturday eve are greeted with this phrase, “Shabbat shalom”, שבת שלום, which means “peaceful Saturday.”

Shabbat is the seventh day of the week, which is essentially a holiday for the Jews. Already the day before Shabbat, Jews begin to wish each other “Shabbat Shalom”, that is, “Peaceful Saturday” or “Hello Saturday.” The main rule of the Sabbath is that a person should not work.

Greetings from Friday evening and Saturday in Hebrew. Shabbat is Saturday, shalom is peace. This is a possessive construction, שבת של שלום, Shabbat Shel Shalom, the Sabbath of peace, that is, a peaceful Saturday. Literally: “Saturday rest.”

Shabbat Shalom

In Hebrew literally means the wish of a peaceful Saturday. It is a unique greeting that can be used anytime on Shabbat, although it is generally accepted to say it at the conclusion of the Sabbath ceremony of Kabbalah Shabbat.

Gut Shabes

This analogous expression in Yiddish literally means “good Shabbat.” Like the expression “shabbat shalom”, it is used to greet everyone on the Sabbath. From my own experience, I know that the greeting “Gut Shabes” can be honored in ordinary conversation or when meeting people, while “Shabbat Shalom” is more used at the end of the Kabbalah Shabbat ritual.

Shavua Tov

Translated from Hebrew – “good week.” The greeting is used after the Havdala ritual (a ceremony marking the end of the Sabbath) to wish someone a good upcoming week.

Source: https://isroe.co.il/kogda-nado-govorit-shabbat-shalom-kak-gramotno-otvetit-chto-eto-znachit/