Centering the content and header would make it better. Reducing the height of the header and making it take all the page's width helps.
The page's title is:
>"static forms google sheets as a database"
I'd change that to something else. A sentence with a subject-verb-object would be better. Even "fabform.io" or "fabform.io | Google Sheets as a Database" would be better in my opinion.
>Use google sheets as a database to save static website form >form submissions to google sheets
I'd write "Google" with a capital "G" and "Sheets" with a capital "S".
>Easy no code serverless solution
I'd drop the mumbo-jumbo "no code serverless solution".
There are ten (10) instances of the word google|Google in that page, that is too many.
>Save static website form data direct to Google sheets
It should be "directly", not direct. An adverb.
>Built in Google sheets integration
"Built-in", and I assume there's a built-in Google Sheets given that the whole product is about that.
>Add a row to Google Sheets when someone submits a static website form.
Why "static"? Does that not work in a dynamic website?
>Update a row in Google Sheets when someone submits a static website form.
What's the "primary key", given the reference to databases. When will it update a row, and when will it add a row?
>* restful google sheets api*
What does that mean?
>Use Google Sheets as a database for your static website.
This has already been mentioned.
>example html static website form.
Maybe "Example HTML:" (capitalized "E", and "HTML" ending with a colon ":" for what follows).
>* <input type="hidden" name="accessKey" value="insert-publice-key-here">*
How to generate a public key for the Google Sheets API? Adding a link to a tutorial helps.
Adding GIFs and screenshots would clarify how this works.
All the best,