A static website is a website that uses only HTML, CSS, and Javascript.
A static website does not use a programming language, web framework or a server-side website database.
The advantage of having a static website is that they can be deployed fast, and the HTML pages can be served quickly.
You can create a static website very easly with a static site generator like Hugo
And deploy your website on a free static website hosting platform such as Netlify
The question now remains, where to save the static form data (form submissions), since static websites don't have a backend database.
One way around this is to use Google Sheets as a website database to save the static form submissions.
You can use Fabform to handle your static forms and save the static form data direct to Google Sheets