I guess this refers specifically to the following bullets:

* Vectorized RAIDZ - Hardware optimized RAIDZ which reduces CPU usage. Supported SIMD instructions: sse2, ssse3, avx2, avx512f, and avx512bw, neon, neonx2

* Vectorized checksums - Hardware optimized Fletcher-4 checksums which reduce CPU usage. Supported SIMD instructions: sse2, ssse3, avx2, avx512f, neon

* GZIP compression offloading - Hardware optimized GZIP compression offloading with QAT accelerator.

All use vector and/or SIMD instructions on the CPU, thoughh QuickAssist (QAT above) is available on dedicated add-in card also.