General settings → Site identity: the page title and description in both languages. A good description is 120–160 characters and says what you actually offer.
Every article, project and page has meta title and meta description fields. Leave them empty and the system uses the title and summary automatically.
Generated automatically at yoursite/sitemap.xml — it includes every article, project and help page in both languages.
Submit it once to Google Search Console.
Under Settings → Tracking: paste the Google or Bing verification code and it appears in every page's head.
Ready at yoursite/robots.txt, blocking the dashboard and the uploads folder.