You're not charged until a shopper clicks your ad — in other words, when your advertising is working.
Once you’ve started a campaign you can try new keywords, adjust your budgets, and pause or restart at any time.
Create your account on Seller Central, the Web interface where you will also manage your selling account.
Start by setting your budget and duration. Next, choose the keywords that will make your ad show in search results or use our suggested keywords. Finally, select your products and launch your campaign.
Highly relevant ads are delivered to very targeted searches. Your ads may be displayed on page one of search results and on product detail pages.
Use Sponsored Products reports to measure and optimize your ad spending so you can see for yourself the return you get for each dollar spent.