In Yoast SEO, the snippet
preview lets you change your SEO title, which is what shows in search
results. Why would you? Well, your H1 (the page title) is meant for
people that are already on your site. You could want your SEO title to
differ from that. It could be more enticing, so people choose your site
over the other search results. Whether or not you change it is up to you,
and this post helps you think through what fits your goals best!
What's the difference between
your H1 and your SEO title? »