Paying for outside QA processes would be an example of a non value added process. Doing (arbitrary) documentation (like customs paperwork) is not value added. Creating a user manual for software is value added.
But to answer your question, SEO seems like something you're looking for. I'm not sure sales counts, considering it's not really a STEM type job.
In sales or sales engineering it is easy to measure your impact. I cost $X and I bring in 10x in revenue. But it is a lot harder to measure the value of someone in a back office or development role, but it doesn't make them less or more valuable to the organisation.
Every company defines value differently. I work for a university, we have desktop support engineers who could be easily outsourced if you only looked at them as low level techs, but they care about our mission, about teaching, research and learning and put in 10x the effort that an outsourced low cost tech would from one of the big firms.
You want to contribute to building or maintaing that.
As a developer I helped execute on that grant, which worked out really well so our odds are good to get the next grant. Subscriptions won’t get renewed unless we keep up the web site, keep putting data in it, etc.