Highly capable, but complex and expensive for when you need a custom solution

The main reason to use Sitecore is if you want to develop something completely custom. It can be a fit if you have a large budget and a specific vision that can't be achieved with a more off-the-shelf solution. It also has good features for controlling the publication of new content through multi-step in-ouse approval processes. Sitecore is very capable, but I would try to avoid Sitecore if you can because it is a beast to work with and is very expensive to implement.