Why your own domain matters
Every Marcus project is served at aimarcus.love/p/your-project. That is fine for drafts and reviews. For a business people should remember and trust, getfreshbread.com beats a path on someone else's domain, and links you earn stay with you if you ever change tools.
Where to buy a domain (and what to avoid)
Namecheap, Porkbun and Cloudflare Registrar all sell a .com for roughly €10-15 a year. Check the renewal price before buying: some endings cost €1 in the first year and €30 after. Skip "free domain with hosting" bundles; moving away from them later is painful.
Export from Marcus and pick a host
Open your project and download the ZIP. It holds plain HTML, CSS and JavaScript with index.html at the root, so any static host will serve it: Netlify, Cloudflare Pages, GitHub Pages, or the web space that comes with your hosting plan. Upload the files and check the host's temporary address before touching DNS.
DNS basics: A records vs CNAME records
An A record points a name at an IP address. A CNAME points a name at another hostname. Your static host tells you which one it wants and the exact value. A common setup is an A record for the bare domain and a CNAME for www.
In the registrar's DNS panel, delete old A and CNAME records for the same names first, then add the new ones. Most panels want @ for the bare domain and www for the subdomain, not the full name.
HTTPS on your domain
Static hosts issue the certificate for you once DNS points at them, usually with Let's Encrypt. If you use Cloudflare for DNS and the host has to issue its own certificate, switch the record's proxy (orange cloud) off until HTTPS is live.
Testing propagation
Run dig +short yourdomain.com. When it returns the value your host gave you, DNS is live from where you are. Changes usually show within an hour and can take up to 48. If you still see the old answer, flush your local cache (ipconfig /flushdns on Windows) or test in a private window.
Keeping the site up to date
The hosted copy does not change when you revise the project in Marcus. After each change you want live, download a fresh ZIP and upload it again. Set a reminder a month before the domain renews, because renewal emails often land in spam.