Use metadesc on my site

I know this has been asked but it seems that the answer needs periodic update. I want to use the meta description in my site.

I found:

$object = WPSEO_Frontend::get_instance();
    $og_title = $object->title( false );
    $og_url = $object->canonical( false );
    $text = $object->metadesc( false );

But it no longer works – I get empty strings even though snippets have been set up. What should I be doing?

https://www.ads-software.com/plugins/wordpress-seo/