Filters can be used to narrow down the data in the worksheet .It is a method to show only the qualitative data.Filters are used to show the data that is only required to be displayed
Step-by-step explanation:
Following are the steps in filteration
- Begin with a worksheet that identifies each column using a header row.
 - Select the Data tab, then locate the Sort & Filter group.
 - Click the Filter command.
 - Drop-down arrows will appear in the header of each column.
 - Click the drop-down arrow for the column you want to filter. In this example, we'll filter the Type column to view only certain types of equipment.
 - The Filter menu appears. 
 - Uncheck the boxes next to the data you don't want to view, or uncheck the box next to Select All to quickly uncheck all. 
 - Check the boxes next to the data you do want to view. In this example, we'll check Laptop and Projector to view only these types of equipment.
 - Click OK. All other data will be filtered, or temporarily hidden. Only laptops and projectors will be visible.