Are there any rules about writing blog tags? What is the format? Capitalized or not? Should we use commas between words? Thanks.
They are comma separated. You can enter anything you want in any form, they are only used in the website itself, via the “blog tags” element.
Should words be capitalized?
Again, this is only used on your website, so you can use any style you like, or that looks how you want it to look on your site.