The ancients forbade breaking salt at home. It has been believed in society in the past that salt can cure various diseases.
The use of this salt is also associated with Rasulullah ﷺ. However, the narration says that Rasulullah ﷺ felt a pinch of salt on his tongue before eating is not authentic.
There are also those who think that when they arrive at a new place, before eating, take salt first to adjust the hormones in a new place.