Compared with low TMB patients receiving ICIs, high TMB yielded a better ORR (RR = 2.73; 95% CI: 2.31-3.22; P = 0.043) and DCB (RR = 1.93; 95% CI: 1.64-2.28; P = 0.356), and a significantly increased OS (HR =0.24; 95% CI: 0.21-0.28; P < 0.001) and PFS (HR = 0.38; 95% CI: 0.34-0.42; P < 0.001)....TMB is a promising therapeutic and prognostic biomarker for immunotherapy, which indicates a better ORR, DCB, OS and PFS.