We have a section on our site that is doing quite well. Pretty steady for 5-7 years. We change little things every year, mostly design related ...
We are considering adding about 5% of unique content to each page which would partially include relevant keywords. The content would be short sentences from our "feedback engine", which is not published yet. Each sentence is unique and we will edit it in case it has typos. It gives added value to our visitors.
Do you think that would count for "Freshness" and give a slight boost or is it a waste of time to think in terms of SEO? Or is it even risky because it looks like keyword stuffing, although it is not?