In the case you highlight the alternative rows, please follow steps below for details:
Step 1: Click the first cell in the column next to the dataset;
Step 2: Click the Home Tab from the ribbon;
Step 3: Click "Conditional Formatting" in the Styles section;
Step 4: Click "New Rule" in the drop-down list;
Step 5: Select "Use a formula to determine which cells to format";
Step 6: Type formula "=Mod(Row(),2)=1" in the box;
Step 7: Click "Format" button under the box;
Step 8: Click the "Fill" Tab in the "Format Cells" window, and select a color (e.g., Orange), then click "OK" at the bottom;
Step 9: Click "OK" in the "New Formatting Rule" window, the first cell is now highlighted in orange;
Step 10: Copy the cell down to the last row of the dataset, and the alternative rows will be highlighted.