Always a useful move, avoiding the unpleasant Ng5.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... a7a6  4. b5a4  4... g8f6  5. e1g1  5... b7b5  6. a4b3  6... f8c5 Caruana is a big specialist in the Arkhangelsk, one of the most dynamic choices for Black in the Ruy Lopez. 7. c2c3  7... d7d6  8. d2d4  8... c5b6  9. c1e3 This is a popular move in 2023. 9... e8g8  10. b1d2  10... f8e8  11. f1e1 