Generally speaking, adding salt to tea has no obvious effect and function. However, in some cases, adding salt to tea may have the following effects:

1. improve the taste: adding salt to tea can enrich the taste of tea and increase the bitterness and umami taste.

2. Improve digestion: Salt can promote the secretion of gastric juice and help digest food.

3. Antibacterial effect: Salt has a certain disinfection effect, which can inhibit the growth of bacteria and reduce microbial pollution in tea.

4. Supplementing sodium salt: A proper amount of salt can supplement the sodium salt needed by the human body.

It should be noted that when drinking tea, a proper amount of salt can increase the taste of tea, but excessive salt may have adverse effects on health, such as high blood pressure. Therefore, the amount of salt should be controlled and not excessive.