As of now, we can't automatically detect changes in your website content to continuously adjust your Search Ad's.
If you make changes to your website content which is important to your advertising you would need to create a new Search Ad's to allow us to include this in your ads and keywords.
If the changes are major, you should consider getting your account reset in order for our system to provide you with even better and more relevant ads and keywords,
When you go through the setup process, we will build new Search Ad's based on the latest website content.
Please contact our Support Team to request a reset.