I have been seeing very high number of dynamic URLs on Google Webmaster tools. There is no way Google search bot can find out these URLs unless (reasons I can think of)
- Google search bot can choose multiple options in my HTML form and click on the submit button
- Google search bot can read through Google Analytics stats and add those URLs to the search index.
Now based on my limited knowledge, both of the above should not be possible. One of my other sites has a +1 button and that could be another potential reason.
Any insights on this will be highly appreciated.