Even though a Terms of Service isn't currently required by law, third parties and service providers such as Facebook, Google and Mailchimp may require it if you use their services or integrate their platforms into your website.
A Terms of Service will benefit any and all sorts of websites no matter what platform used, including:
- Your own hosted website
- And many more
Don't forget to get proper consent from your site users to agree to your Terms of Service. This will make sure your agreement is legally enforceable.