Open Google Sheets and enter your data in a table format.

Select the data you want to include in the graph.

Click on Insert > Chart from the menu.

Google Sheets will generate a default chart; customize it using the Chart editor on the right.

Under the Setup tab, choose the desired chart type (bar, line, pie, etc.).

Modify labels, colors, and titles under the Customize tab.

Once satisfied, move or resize the graph within your sheet.