SWIFT (Society for Worldwide Interbank Financial Telecommunication) is also known as BIC (Business Identifier Codes) and as SWIFT-BIC, BIC code, SWIFT code, ISO 9362. These codes are used for international money transfer between banks.
SBIN IN BB 455 (Example)
First 4 characters are used to identify Banks and Financial Institution, Next 2 characters are used to identify Country (ISO country code), Next 2 characters are location codes. The second character is meant as follows (if applicable),
Last 3 characters (if available) denotes branch [619 denotes primary office]