Open SEO from the panels menu.
Set the title and description for the whole site and for each page.
Set the image shown when your site is shared on social media and in messages.
Use Fix it on any warning to apply a fix. SEO fixes don't use credits.
Settings apply the next time you publish. Published sites include their content in the page itself, so search engines and link previews see your real text.
You can also ask the chat, for example: "Improve the SEO on my services page and publish".