Amazon listing services or optimization is the process of improving the visibility and sales of an Amazon product page by making it buyer-friendly (descriptive and appealing content) as well as amazon friendly (embed high SV relevant Keywords).

Amazon Title:

As a general rule, keep your message between 140 and 180 characters long. However, some product categories allow for longer titles, so make sure to read the category's requirements carefully.
Each word's first letter should be capitalized.
Don't use ALL CAPS in your writing.
Conjunctions (and, or, for) and articles (the, a, an) should not be capitalized.
Prepositions with fewer than five letters should not be capitalized (in, on, over, with).
Make use of numerals (2 instead of two)
Spell out measurements ( 6 inches not 6" )
Symbols like! * $? Should be avoided.
Type 1 High ASCII characters (, ô, etc.) should not be used.
THE TITLE CAN'T BE MORE THAN 200 CHARACTERS LONG.

Bullet Points:

These should be the same as your product's "features and benefits." Content is the first bullet feature (For example, material)
BulletFeature2: Benefits and features
BulletFeature3: Features and benefits
BulletFeature4: Features and benefits
BulletFeature5: Warranty/Care/Special Care
EACH BULLET POINT CHARACTER IS LIMITED TO 500 CHARACTERS.

Description of Product: 

Experiment with several long-tail keyword variations.
The description should be HTML and the character limit is 2000 characters.

Images:

Make the background completely white.
Show the full product, but only what is listed in the product listing, such as accessories that aren't included. At least 80% of the image should be covered by the product. Make sure the image is at least 1,000 dpi. This maintains a good resolution when the customer zooms in.
Amazon allows 7 images to display
wherever feasible and uses professionally taken photos.
If you are taking the photo yourself, make sure it is well-lit and in focus.