HSF Activity Areas and Interest Groups are led by enthusiasts and advocates for a particular area of work or of technology interest and provide a focal point for organising dicussions in the HEP community. They can also cover engagement with external projects, like Google’s Summer of Code.
They are less formal, in the HSF, than working groups and any relevant and reasonable activity for HEP can spawn an interest group. If you want to put some community-wide activity under the umbrella of the HSF as an activity areas or interest group just contact the HSF coordination team.
Activity areas are added to the website of the HSF, with description and contact information and will have a dedicated mailing list and, if appropriate, an Indico category.