You can capture location specific meta data within your source content and then use it in your generated HTML pages.
The most common way to use this kind of data is through the Page.asp template file.
For example, a marker called ReviewDate in your source content could contain the date this section of the file was reviewed. Then using an advanced customization of Page.asp, the following would conditionally emit its value on the generated HTML page.
<div wwpage:content="wwmarker:ReviewDate" wwpage:condition="wwmarker:ReviewDate">
October 20, 2021
</div>
Last modified date: 02/15/2023