What happened Shake Shack (NYSE: SHAK) jumped 13.3% on Tuesday after the restaurant chain released preliminary fourth-quarter results that were better than many investors expected. So what Shake Shack's revenue soared 29% year over year to $203.3 million, driven by restaurant openings and a 20.8% increase in same-store sales at company-owned locations. Both figures were above Wall Street's estimates, which had called for revenue of $198 million and comp growth of 16.9%. Notably, Shake Shack's comps also rose 2.2% compared to the pre-pandemic fourth quarter of 2019, marking the chain's recovery from its coronavirus-related lows in early 2020. Image source: Getty Images. Now what Shake Shack is experimenting with an array of digital technologies to further its growth and improve its profitability. The company opened its first drive-thru location in December. CEO Randy Garutti said early results are "encouraging," and the company plans to roll out more drive-thru stores in the coming years. "It could be a really big expansion plan for us," said Steph So, Shake Shack's head of digital experience, during an interview with PYMNTS.com. The restaurant chain is also testing ways to digitize its kitchen operations to increase efficiency and better serve both in-store diners and online customers. Self-serve kiosks, digital ordering platforms, and delivery are additional areas of focus that are likely to play important roles in Shake Shack's expansion strategy. After opening 58 net locations in 2021, the company expects to open at least 50 new stores this year. 10 stocks we like better than Shake ShackWhen our award-winning analyst team has a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* They just revealed what they believe are the ten best stocks for investors to buy right now... and Shake Shack wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of January 10, 2022 Joe Tenebruso has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.Source