A Google Business Profile post is not a full article. It is not a social media post either.
It is a short update that appears close to the point where people are already searching for a business, service or local option. That makes it useful.
For a small business, Google Business Profile posts can help show that the business is active, relevant and ready to deal with enquiries. They also support the website by giving people more reasons to click, call, book or read more.
Google Business Profile is not a magic fix. It will not replace a proper website, strong service pages or clear content. But it is a very useful support tool when it is used regularly and sensibly.