Step 1: Login to your Amazon Advertising account
Step 2: Click on the "Create campaign" button
Step 3: Select Sponsored Products campaign type by clicking on the "Continue" button under the tile
Step 4:
Step 5: Select bidding strategy. Leave the default selected, you can change this setting later on after the campaigns is optimized.
Step 6: Create Ad group. Using consistent nomenclature here is also very important. Good rule of thumb is to add only one child ASIN per ad group, so the naming of the ad group should reflect that.
Example: "Child ASIN - color/size"
Step 7: Add products to advertise. As mentioned in the previous step you should add only one product per ad group especially in auto targeting campaigns.
Step 8: Select Keyword targeting
Step 9: Product targeting offers two types of targeting - "Category" and "Individual Products" targeting. Category targeting can be refine further by selecting specific competitor brand, star ratings and price of products.
Step 10: This step is optional. You can add your own products as a negative if you have separate "Defensive" campaign which will make it easier to measure your brand impact.
Step 11: To start the campaign click on the "Launch campaign" button.