location to insert breadcrumb code? help me

in which specific location should I add the code to make breadcrumbs visible on my website?

try in
-header
-sidebar
-single

someone knows, I will keep trying although it would be better if someone could help me and not waste so much time

code

<?php
if ( function_exists(‘yoast_breadcrumb’) ) {
yoast_breadcrumb( ‘<p id=”breadcrumbs”>’,'</p>’ );
}
?>