Online Help Desk Certification can cover a lot of situations from website support questions to technical questions about linux and other systems.
You can get software for this purposes and there are also courses dealing with complex IT issues.This could involve Certified Help Desk Analyst (HDA) certifications. You need to think about what business this is being applied to as help desk depth can vary due to customer needs.
Whatever the situation is, people want online help desk and deserve to have it so that they can work with the applications they have paid for or programs they are trying to run.