Labs tool is a place where experimental or alpha-stage features are published. You can enable or disable them on per-database basis.
You can find it in the Setup > Database tab > Tools > Labs link.
There you will also find the link to a corresponding idea in Idea Exchange - feel free to comment.
Please note that the features published in labs are experimental. They can be added or removed and their implementation can be changed anytime. Some of them will find their way to TeamDesk, some will not. We would not recommend to rely on them in the production environment.
Next: Development Branch