BlockMap

BlockMap[f,list,n] applies f to non-overlapping sublists of length n in list. 

BlockMap[f,list,n,d] applies f to sublists with offset d in list. 

BlockMap[f,list,{n1,n2,…},…] applies f to blocks of size n1×n2×….

Please visit the official Wolfram Language Reference for more details and examples on core symbols.