It is true that What's New in macOS 10.14 Mojave They are not to rave about, but we have some of them interesting for users such as Stacks or stacks of files that can now be done on our Mac desktop. In this way everything will be a little more organized and will not seem like a chaos the desktop of many users.
The truth is that for those who move a very large amount of documents it can be something really superficial in terms of novelty since it is almost certain that they already have well organized deskEven these Stacks may be a bit annoying to search through a huge number of photos, videos or text documents or similar, but in most cases as we say it will be interesting to organize the desktop.
Stacks will organize the documents for us
As we say, it is about grouping the different types of files or documents so that they are together on the desktop without the need to create folders or the like. The function is automatic and allows us to have an order for which we usually save everything that arrives directly on the desktop and then stays there for a long time, in my case I usually organize it through folders but this management system can be fine for those who do not have that order or who do not accumulate too many files on screen. When we want to see the documents separately, we simply have to click on a stack and they will open on the desktop, then click on the one we want to open and that's it.
The function can be activated or deactivated by the user and in this way it is avoided that those users who have a huge amount of documents but all of them organized, do not have problems when managing PDFs, photos, videos, text documents, etc.