Keywords and Meta Description - HIGH IMPACT
What you write in the description area can make a big difference. This is what’s going to convince people to download your app, along with being picked up on any search terms coming through the iTunes network. I have seen people double their downloads once they updated their meta descriptions – I did my own experiment where I changed the keywords in the app and tripled my download numbers.
TIP – Keyword research for the app market is NOT like a website. Don’t use keyword optimizer. Instead, find as many apps that are just like yours that have huge download numbers, and use the names of those apps as your keywords. You should be able to get about 8 app names in your keyword area and it will skyrocket your downloads.