If we don't set the submit button's value attribute, the button will get a default text "Submit".try this example
<form action="action_page.php">
Employee name:
<input type="text" name="EmployeeName" value="Shivam Pandey"><br>
Employee Company:
<input type="text" name="CompanyName" value="QueryHome"><br><br>
<input type="submit">
</form>
and try this example too when we set the value attribute:
<form action="action_page.php">
Employee name:
<input type="text" name="EmployeeName" value="Shivam Pandey"><br>
Employee Company:
<input type="text" name="CompanyName" value="QueryHome"><br><br>
<input type="submit" **value="Submit Employee Details"**>
</form>