Third-party networks can effectively reach a wider audience and increase ad impressions, but they may not always provide the best return on investment for your AdWords display budget. These networks work by displaying your ads on various websites, often with limited control over where your ads are shown.

One common issue with third-party networks is the lack of targeting options available. While Google AdWords allows you to target specific keywords, demographics, and locations, third-party networks may have limited targeting capabilities. 

This can result in your ads being displayed to a broader audience, many of whom may not be relevant to your business or are less likely to convert into customers.

Additionally, the quality of traffic from third-party networks can vary significantly. Some websites that display these ads may have low-quality content or attract users who are not actively searching for products or services similar to yours. This can lead to a higher bounce and lower conversion rates, ultimately wasting your ad budget.

To mitigate this, it is essential to regularly monitor and assess the performance of your ads within third-party networks. Identify which websites drive the most relevant and high-quality traffic and focus your budget on those platforms. Consider using conversion tracking to measure the effectiveness of these networks and make data-driven decisions to optimize your campaigns.

In conclusion, while third-party networks can expand your reach, it is crucial to carefully evaluate their performance and ensure they align with your targeting goals and desired ROI. Regular monitoring, optimization, and data analysis are key to maximizing the effectiveness of your AdWords display budget.