Google's service for converting text into natural-sounding spoken audio. Like having a professional voice actor that can read any text in multiple languages and voices.
Navigation apps use Text-to-Speech to provide driving directions in natural-sounding voices.
All four services convert text into spoken audio using neural voices. They differ mainly in available languages/voices, SSML features, streaming options, and how pricing is measured (characters, voices, and add-ons like custom voices).