Traditionally, it refers to the monetary market value of a company based on outstanding shares of stock. Market capitalization is used to show the size of the company. in Crypto, market cap is measured by multiplication of the circulating supply of tokens or currency and its current price.
In cryptography, a salt is the additional random input that is added to password or passphrase to make the password hash unique. It prevents from the hashed output password to be cracked so easily by the hacker.