指定哪些单元格扩展单元格区域以及哪些单元格不在CSS网格中的内容

I want to have a cell in a grid with unimportant information which doesn't make any other cells expand beyond what's absolutely required. Its height should be no more than the height of other cells and its width should be that of empty unoccupied area.I want to have a cell in a grid with unimportan