At the time, Musk had tweeted that Twitter had too many bots, which is why he was trying to renege on his commitment to buy the company.

Amazon and Jeff Bezos had previously invested in the startup. The deal signals the e-commerce giant's interest in doorstep delivery.

The deal comes after Unacademy’s valuation plunged from $3.5B to under $500M, as India’s once-booming edtech sector struggles.

Shardul Shah of Index Ventures walks us through Google's biggest acquisition ever.