This is always a difficult one. Sometimes it can be easier to solve with technology, while other times it's a bit more difficult to track/measure.
With technology:
- You can track which content is being sent out/used
- You can track how many reps are 'customizing' a deck in their workspace
- etc.
- However, the issue with this is that you might see a pitch deck you worked hard on isn't being used at all. In that case, you need to evalutate whether its an adoption issue or a quality issue (ie. not the right pitch)
Without technolgy:
- You really need to rely on feedback loops and finding sales champions to work with
- Meet regularly with those champions to review assets and listen to them on what's working, what's not, and what they'd suggest improving
- Ask your reps to surface and share with you the assets they're creating on their own. Oftentimes reps are creating materials on their own, because they have a need and don't want to wait for marketing. So ask them! Then take those materials as guidance for how you can optimize, improve, and standardize them as 'approved materials' that are on-brand.
At the end of the day, every company and sales team will need the same core assets/materials. Things such as an approved pitch deck, a few core one-pagers, a pillar page on your website, or a tool such as an ROI calculator. So it really comes down to a matter of quality over trying to figure out 'which materials to create' and this can only be figured out through sales rep feedback and working with them.
So in short = work with your sales counterparts to listen, learn, and then create.