It can be either, Threadworm!
A VLE (also called a learning platform) is basically a computer system, normally working over the internet, that supports teaching and learning.
It's really a series of 'spaces' to which either individuals or groups have access by passwords & security settings - pupils have a space to which they can upload their work, so they can work on it at home, or their parents can see it. Teachers can set tasks & quizzes, which the pupils complete online, and carry out assessments, parents can log in & see their children's work.
You can set up groups for almost anything - for example we are planning a group page on internet safety which will give parents access to guidance & resources to help keep their children safe on the internet at home. We'll post the latest draft of our internet security policy & set up a forum so parents can discuss it & share ideas.
You can also invite parents to share their experiences on forums, eg for history lessons or to share their expertise in a particular area. There are also collaborative projects between other schools in the UK or abroad, and the children or teachers can create blogs, wikis, surveys & podcasts, and upload photos, sound files & videos.
The main problem with all this is time - or lack of it - to actually create the content & make sure it's kept up to date, which is why the provision, even amongst those schools that do have a learning platform, is so variable.