WordPress SEO Yoast.

Hi I use wordpress SEO Yoast.

Is this the only way I should be doing page titles, descriptions and so on? When I anaylise my site through other sites I keep being told my site title and description is not being found and this harms my SEO??? I am new to wordpress so forgive me if I have missed something.

Example of what I am told, that no title is visible. – https://www.rankingtoday.com/seo/site-checkup.php?site=63049d374509b6e5ba65d4e782ed2113_ma

Do I need to put title and description in the header.php??

Thanks , my site is Essex Pest Control and Bird Control