Analogue radios transmit voice as a continuous signal, while digital radios convert speech into encrypted digital data before being transmitted via radio waves, where the recieved data is then un-encrypted by the recieving radio/s and played back to the recipient.
Digital two way radios offer:
Clearer audio quality
Better range efficiency
Longer battery life
Advanced features such as encryption and GPS
Reduced background noise
Analogue radios are often more cost-effective and compatible with older systems. Many businesses upgrade to digital for improved clarity and long-term scalability.