In brief, voice search is a technology that allows users to perform Internet searches by speaking aloud instead of typing into a search field. This is extremely convenient when your hands are otherwise occupied, or when you’re having a hard time seeing the screen due to lighting or vision issues.
You can do a voice search almost anywhere – and at any time. Any device with a microphone is generally capable of conducting a voice search, including mobile devices, laptops, tablets, and smart speakers. Voice recognition and language processing has led to rapid improvements in the technology, so that a great percentage of searches are accurate, and voice assistants (sometimes called digital assistants) are paving the way.
When Siri was first released in 2010 it was hardly taken seriously. However, as time has passed and Siri and the other voice assistants have increased their accuracy, usage has also increased.
A test examining performance conducted by Stone Temple Consulting (updated in May 2018) found that Google Assistant was the best performing service on mobile.