Is it possible to fill columns via CSV upload so that everything can be maintained in Excel regarding the link, description, headlines, primary text, and then simply upload it?
There are a couple of features that can help you optimize your workflow for bulk data management:
Copy & Paste from Google Sheets: You can paste values directly from a Google Sheet into Kitchn. You can either "Paste values from clipboard" (tab or line-separated) or "Copy all values as tab-separated text." You can learn more about it here.
Ad Templates: You can predefine headlines, descriptions, primary texts, and many other values, then apply a template to multiple ads in just one click - pre-filling all creative fields automatically. You can learn more about it here.