But if I have no products, the new SEO does not apply to me?
If you do not have services and products if you offer services information is the same.
What you seek in your new SEO practices, is to show Google that your website is relevant to the user, how? … Stay on the site and reducing the percentage of Rebound.
Spent on site: How long your visitors spend on the site?, 1 minute, 20 seconds, 1 hour?.
If you increase the permanency of the users on the site means that these are matters what you have, clearly not the rule, as it depends on the theme of your site, for example in a blog like this where resources are shared and where I usually mention the reference sources is common to have a stay of 1-2 minutes in general, although there are items that generate up to a stay of up to 30 minutes.
Percentage Rebounds: When a person comes to your blog, either a browser or by a reference, but did click on a reference source that you had on the blog and went to another site that’s a rebound, how healthy is to keep a rebound below 70%.
It is not the rule, there are blogs that have a very low bounce rate, up to 20% or 30%, but these are blogs that have a very specific theme and are usually blogs as references to other blogs.