Encryption techniques play a vital role in protecting data transmission by converting information into a secure format that unauthorized recipients cannot easily decipher. Applying methods like SSL/TLS during online transactions ensures that data exchanged between users and servers remains confidential. End-to-end encryption further secures communication by keeping data encrypted throughout its journey, only allowing the intended recipients to access it. As cyber threats increase, robust encryption practices are essential to safeguarding sensitive information, maintaining data integrity, and fostering user trust in digital communications.