This tutorial is designed to introduce you to two powerful features of Google Sheets: Conditional Formatting and Data Validation. Conditional Formatting allows you to automatically apply formatting to cells based on the data they contain, making it easier to visually analyze your data at a glance. Data Validation ensures that the data entered into your sheet meets certain criteria, which helps maintain data integrity and prevents errors. By the end of this tutorial, you'll be proficient in using both features to enhance your spreadsheets.


  • Learn how to apply conditional formatting to highlight important data.
  • Understand how to set up data validation rules to control data entry.


  • Basic knowledge of Google Sheets, including how to enter data.
  • A Google account.

Materials Needed

  • A computer with internet access.

Step-by-Step Instructions

Step 1: Applying Conditional Formatting

  1. Select Your Range: Click and drag to select the cells you want to apply conditional formatting to.
  2. Open Conditional Formatting: Go to the "Format" menu, then select "Conditional formatting". A sidebar will appear on the right side of your screen.
  3. Set the Format Rules:
    • Format cells if: Choose the condition that will trigger the formatting. For example, "Text is exactly", "Greater than", or "Date is before".
    • Value or formula: Enter the value or formula needed for your condition.
    • Formatting style: Choose the text and background colors that will be applied when the condition is met.
  4. Click 'Done': Your conditional formatting rule is now set and will automatically apply to the selected cells.

Step 2: Using Data Validation

  1. Select Your Range: Highlight the cells where you want to restrict the data entry.
  2. Open Data Validation: Click on "Data" in the menu, then select "Data validation".
  3. Set the Validation Criteria:
    • Criteria: Choose the type of restriction you want, such as "List of items" for a dropdown menu, "Number" for numerical restrictions, or "Text" for specific text conditions.
    • Value or Range: Depending on your criteria, enter the allowed values, the range of acceptable numbers, or the text conditions.
    • On invalid data: Choose whether to show a warning or reject input when entered data does not meet the criteria.
  4. Input Message (optional): You can enter a title and message that will appear when users select the cell, guiding them on what to enter.
  5. Save: Click "Save". Your data validation rules are now active for the selected range.

Tips and Tricks

  • Layering Conditional Formats: Apply multiple conditional formatting rules to the same range of cells to visualize different aspects of your data.
  • Custom Formulas in Conditional Formatting: Use custom formulas for more complex conditions. For example, =AND(A1>10, A1<20) to highlight cells between 10 and 20.
  • Using Named Ranges in Data Validation: For dropdown lists, consider using named ranges to manage your list items easily, especially if they might change over time.


  • Issue: Conditional formatting not applying correctly.
    • Solution: Double-check the range selected and the condition set. Ensure there are no conflicting rules.
  • Issue: Data validation allowing invalid entries.
    • Solution: Make sure "Reject input" is selected for "On invalid data". If using a warning, note that it will not prevent entry of invalid data.


With these steps, you've learned how to enhance your spreadsheets with conditional formatting and maintain data accuracy through data validation. These features not only make your data more readable and visually appealing but also safer and more reliable. Experiment with different conditions and validation criteria to find what works best for your needs.

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