How do Google's and Bing's autocomplete work?

@cameron_walter 

Google's and Bing's autocomplete feature works by predicting the word or phrase that the user is typing in the search bar based on a variety of factors, including:

1. Popular searches: The search engine uses algorithms to analyze the most common queries and suggests them to the user.
2. Previous searches: The autocomplete feature takes into account the user's search history and suggests search queries that they may have previously searched for.
3. Location and language: The autocomplete feature considers the user's location and language preferences to suggest relevant searches.
4. Real-time trends: The search engine also analyzes real-time trends and suggests relevant searches based on what's currently popular.
5. Spelling and grammar: The autocomplete feature uses spelling and grammar algorithms to suggest the correct spelling of a word or phrase.

Overall, Google's and Bing's autocomplete feature is designed to make search queries faster and more accurate by predicting the user's search query and providing relevant suggestions.