Check out example codes for "html td tag". It will help you in understanding the concepts better.

Code Example 1

    <th>Column 1 Heading</th>
    <th>Column 2 Heading</th>
    <td>Data in Column 1, Row 2</td>
    <td>Data in Column 2, Row 2</td>
    <td>Data in Column 1, Row 3</td>
    <td>Data in Column 2, Row 3</td>
    <td>Data in Column 1, Row 4</td>
    <td>Data in Column 2, Row 4</td>

Code Example 2

   <title>Working with HTML Tables</title>
   <table>				<!-- create an table object -->
     <tr>				<!-- "tr" represents a row -->
       <th>Name</th>	<!-- use "th" to indicate header row -->
       <th>Date of Birth</th>
     <tr>				<!-- once again use tr for another row -->
       <td>Mary</td>	<!-- use "td" henceforth for normal rows -->

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