Few transactions or extensions can be excluded from your application monitoring process. For instance, webpages with static content (HTML, CSS, JavaScript) can be safely excluded from your monitoring process. Similarly, multimedia files such as images and videos (JPG, PNG, GIF) need not be monitored. 

You can exclude those kinds of URLs from monitoring by providing their file extensions in APM Insight. That way, you can focus on monitoring crucial areas of your application instead.