WordPress Best Practice. IDs or Page Title?

Hello,

I’d like to find out what is WordPress best practice when it comes to displaying content.

Currently i’m using the Page ID to display posts is this best practice or should I be using Title/slug?

Here is a small sample of what im doing

<?php`
$facilityName = get_the_ID();
switch ($facilityName)
{
case “359”:
$facilityName=’banners-brantford’;
break;
case “361”:
$facilityName=’banners-point-edward’;
break;
case “363”:
$facilityName=’banners-ssm’;
break;
default:
$facilityName=’1′;
echo “<p class=’loopErrorMessage’>New and exciting promotions and events are being added. Please check back at a later time for an update.</p>”;
}
?>
<?php $facility_banners = array( ‘category_name’ => $facilityName);
$facility_banners_loop = new WP_Query( $facility_banners); ?>`

Thanks