Trees in duo lingo go
What are trees in duo lingo and their purpose
The 'trees' are language courses. They are the main feature on Duolingo and help so many people learn how to speak another language. They are made up of various language skills and can be added to trees at any time. There are many trees on Duolingo, so you have a wide range of languages that you can choose to learn. Language 'trees' are being added all the time, for example, Czech is coming out in a few days and so is Korean. I hope this helps you understand. : )
All of the skills on the home page make up the skill tree, which is the course. Their basic purpose it to teach another language from a certain language (for example, Spanish for English speakers course). The length of the course varies; the Japanese (on iOS and Android) and High Valyrian courses are the shortest, while the Norwegian and Germans trees are the longest ones.
Every so often, the tree will updated into another version (for example, a tree 2.0 or 3.0), where new content and skills are added (all of the old material covered in the old version of the tree remains).