I need to update many articles at the same time - how do I do that?

Keep it as simple as possible when you work by splitting your export into several parts if you have a lot of articles. Either by filtering on something that distinguishes your articles, such as brand or product group division. Alternatively, by exporting articles that are to be updated with the same information, e.g. included in the same EPD. This gives you a much easier overview of which articles you are updating and with what information.