A KnowledgeBase component is used to store collections of data of varying types, eg. Frequently Asked Questions, Useful Website Links, Files, etc. It may be indicated by a icon.
Sometimes you will only be able to view existing entries in the KnowledgeBase, and add comments to them. Other times teh site admin may allow you to add your own entries. If you are allowed to add your own entries then you will see a green + at the top of the KnowledgeBase start page.
If you are allowed to add entries to a KnowledgeBase component just click on the green + on the KnowledgeBase start page. You may then be asked to select the type of entry you are making, if so select the template that best suits the type of entry you want to make, or you will be taken direct to an entry input page. Complete the form, clicking on the ? next to each field if you want help with what to enter, and then click the submit button at the bottom of the page.
You can modify or delete entries that you have made to a KnowledgeBase by clicking on the Edit link that appears at the bottom of the entry.
You can add a comment to any KnowledgeBase entry by clicking on the 'Add comment' link at the bottom of the entry. These comments behave the same as Forum posts, so you have the same tools for managing them as for Forums.