# You can personalize on all properties and in URLs You can personalize anywhere and with any property by specifying the property name like this: {{City,default=Your city}} default= is an entirely optional fallback for contacts missing that data, you can also just do {{City}}. If you specify the property in the URL of your email template, contact properties will be filled in for tracking on your website. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.emaildelivery.com/docs/what-to-know-before-using-the-email-marketing-platform/you-can-personalize-on-all-properties-and-in-urls.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.