Follow the step to add keywords to your ads on google. 

1. Select “Ad words Campaign.

2. Click on “Keyword Planner’s Assistant.”

3. Select the campaign you want to target in the Keyword Planner.

4. Select add keyword, as the name of Ad words keyword would be good.

5. Select all the keywords you want to use for your ad group

. Select “Create” to start to build your ad group.