Once your website is live, you have a 14-day window to let me know of any errors missed in sign-off or other minor changes. I'll also be keeping a close eye on your site for any issues in its new live environment.
Beyond that, your hosting and care plan carries you. Not hosting with a bit of support bolted on, and not a care plan that stops at "we'll look into it if something breaks" - it's one arrangement holding everything: your hosting, SSL, domain renewals, monthly checks across every page, link and form, accessibility monitoring, embeds watched, and your findability kept current as search keeps shifting. All of it happening whether or not anything's gone wrong.
Depending on which plan you're on, I'll either be making your changes throughout the year, or touching base to see how you're finding things. Either way, I'm here for you, long term.