I have a question regarding 2 sites which has too little content on their 5-10 main category pages. Those pages have almost no content on them but have thumbnails and titles of various individual posts/products and those thumbnails are linked to those posts/product-pages.
I am perplexed on whats the best way to do effectively do onsite seo for such sites. I am inclined towards keeping the existing images on those category pages but adding 1000-1500 words content just below those images for the purpose of effective onsite seo. Would this be the right approach? Are there any alternatives?