To help you reach more potential customers, your ads will now show on content that matches any of the topics, placements or display/video/search keywords you target. For example, if you targeted 'bikes' as a topic and 'cycling' as a display/video keyword, your ads will show on content that matches either.
You’ll also notice contextual targeting simplified into a single page in Google Ads, so you can manage all content targeting types (topics, placements, display/video keywords and exclusions) in a single view. The new page can be found in the 'Content' section under Campaigns 
Just as you can target pages in the Google Display Network about certain subjects, like cars or music, you can also exclude by topic to keep your ads off webpages whose themes aren't relevant to your customers.
This article explains how to exclude topics to not display your ads on specific web pages.
Reasons to exclude topics
- Avoid showing your ads on pages that aren't relevant to your business.
- Filter out subtopics and niche areas that aren't relevant to your business.
- Spend your advertising budget effectively by excluding topics that show a low return.
Example
A travel agency has an ad group that features ads about various types of tours. They decide to target the topic Travel which has lots of relevant sub-topics like Adventure Travel and Regional Parks and Gardens, but exclude subtopics that are less relevant to their offerings like Air Travel.
Instructions
To exclude pages about a specific topic, follow these steps:
- In your Google Ads account, from the Views bar at the top, select display campaigns.
- Click the Campaigns icon
from the navigation menu at the left.
- Click the Audiences, keywords and content drop-down in the section menu.
- Click Content.
- On the 'Content' page, click the Topic exclusions tab.
- On the 'Topic exclusions' page, select the topics that you'd like to exclude by selecting the tick boxes to the left of each one.
- Click Remove.
You can combine multiple exclusion types and your ads won’t match against any of the content that you excluded in your ad group.
