To go about assessing your campaign's performance as well as tweaking several indicators in your campaign/PGN, you can explore 2 options. You need to be at your Campaign Info of your  E,P, B campaign:    

• From login, follow the breadcrumbs to reach PGN level:
• Amazon Seller  >  Ads  >  Sponsored Product  >  Product Group Network

Adding SKUs, Keyword, Negative Keyword/Target

Click the 3-dots button.

From the top portion of the Campaign dashboard at the Campaign Info header bar, click the 3-dots button on the extreme right. This allows you to add elements like SKU, keyword or negative keyword/target to your Exact, Phrase, Broad campaigns

• Add SKUs
• Add Keyword
• Add Negative Keyword/Target

Scenario #1:
Adding SKU

1. From the dropdown list, choose Add SKUs.
2. The Add SKUs modal appears.

1. Choose your product/s and click Add.
2. Click Submit.

Scenario #2:
Adding Keyword

1. From the dropdown list, choose Add Keyword.
2. The Add Keyword modal appears.

Enter your keyword/s and click Add.

Scenario #3:
Adding Negative Keyword  

1. From the dropdown list, choose Add Negative Keyword/Target.
2. The Add Negative Keyword/Target modal appears.

Enter your target/s, and click Add.

Related Help Center articles:

• Using Campaign Info: Changing default bid and campaign status in EAT/PAT campaigns
• Changing campaign settings using Campaign Info at PGN level
• Retrieve and Review campaign performance using Campaign Info
• 5 Campaign Info pages of EPB campaigns
• Viewing and managing all your Campaigns
• Edit your PGN: PGN name, daily budget, and default bid
• Compute for Rules using Rules Wizard