Why Amazon Search?
Search is the primary way that customers use to locate products on Amazon.com. Customers search by entering keywords, which are matched against the search terms you enter for a product.
Well-chosen search terms increase a product's visibility and sales. The number of views for a product detail page can increase significantly by adding just one additional search term - if it's a relevant and compelling term.
Ranking Factors on Amazon
The Importance of Reviews
More reviews and better ratings might lead to better sales. Most products that rank well for broad searches have many reviews but it is difficult to tell if the good reviews lead to more sales or if high sales volume leads to more reviews.
You can encourage more reviews by emailing your purchasers and asking them to leave a review.