From Protocol:

The company chose Atlanta for its future growth for one explicit reason: In order to meet its hiring goals for technical teams with a diverse range of perspectives, the company needed a location that produces diverse and creative talent and would continue to attract more. No other city could surpass Atlanta’s potential to do that, Chris Lehane, Airbnb’s senior vice president for global policy and communications, told Protocol.

The fallout from Covid-19 accelerating work from anywhere has a large number of California-based tech companies looking for other places to search for talent. Atlanta has a ton of ingredients – relatively low cost of living, good weather, good local talent pools and a very diverse workforce – that make it appealing to any company looking outside of SF for talent.