By adding the checked="checked" attribute and value into the <input> tag for a group of check boxes, you can:

Adding the checked="checked" attribute to a checkbox input element allows you to preselect that checkbox so that it will appear checked by default when the page loads.

In a group of checkboxes, you can add the checked attribute to as many checkboxes as needed. This enables the user to see them already selected without requiring any action on their part. Preselecting multiple checkboxes can be particularly useful in forms where you want to encourage particular selections or highlight common options for users.

This capability contrasts with single-selection inputs like radio buttons, which allow only one item to be selected at a time. Therefore, the ability to preselect any number of checkboxes directly aligns with options for user convenience, making it straightforward for users to interact with forms that have multiple choices.