A simple SEO tip to boost revenue is to find and optimize low hanging fruit.
Step 2: Tweak the title tag, headline tags, and on-page copy to target those keywords and related phrases. Also, update the descriptions to be more click friendly.
Step 3: For high value keywords I would suggest updating the copy to add a lot more content.
Step 4: Identify pages on your site that mention those keywords internally. Have some of those pages link back to the content you are trying to improve rankings for.
Step 5: Rinse & Repeat — Moving keywords from page 2 and 3 to page 1 is a quick SEO win that will boost revenue.