User actions that can be tracked without goals
To get information about whether users are viewing the entire page, use the scroll map. This map also shows the parts of the page that users view most often and for the longest duration.
You can find out how much time users spent on the site in any Yandex.Metrica report — the table shows the Time on site metric. You can also create segments by specifying a condition with the number of minutes that you believe users should spend on the site.
To track the number of purchases made on the site, along with the items ordered and the cost, use E-commerce.