Yes, you’ve read it right, Wood Wide Web, but it's not your digital term, it’s more of the biological term.
You’ve probably heard about the root system of the plants, it’s sort of connected to that.
It is the term used to describe the underground network of microbes that connects the trees. Through this system, the trees exchange Carbon dioxide gases with each other (for photosynthesis).
This system is very similar to its digital form, which is the World Wide Web, for the sake of understanding, I will assume it as a WWW-D, where D is for Digital. This is because this connects us humans to grow with each other by sharing information and knowledge.
WWW system may extend through the whole forest, helping young trees that are struggling on a dry patch for carbon transfer from the healthier trees. This is just like the WWW-D, which helps educated and senior humans to share their knowledge with Junior and less educated humans.
For the sake of understanding, I would like to mention one example, Lichens represent a mutualistic relationship between a fungus and photosynthesizing algae or cyanobacteria.
Or it can be Mycorrhizae, which are the mutualistic relationship between fungi and the roots of higher plants.
Or Rhizobacteria, which are the mutualistic association between bacteria and roots.
Hope I have cleared your doubt between WWW and WWW-D (D was included only for understanding).