Steps for adding new keywords
Add Keyword: Go to the Keywords tab in the left navigation menu. Click on the +Add Keyword button.
Enter Keywords: Select the campaigns to which you want to add keywords. If you don't see a particular campaign, make sure you've selected the related campaign types at the top. Enter all your keywords on the right side, separated by line breaks. Then click on the Next button.
Select Match Types: Choose the match types for each keyword and click on Next.
Enter the Bids: Enter bids for all the match types.
Submit: Click Submit and your keywords will be added.
Keyword Suggestions
This tab contains keyword suggestions from manual and auto campaign search terms.
Once you select keywords, a top bar with various options appears:
Add Campaigns: Create new campaigns using the keywords.
Add as keyword: Add keywords to current or multiple existing campaigns.
Dismiss: Dismiss the keyword recommendation from the list or never recommend again.
You can also find performance metrics, such as the last 7 days' spend, revenue, impressions, clicks, etc., for these keyword suggestions.