We have a ASP.NET web forms site and our product pages can be accessed from, for instance,
~/product.aspx?id=1234 or through an alias
The product is primarily searched by it's Catalog # (for example H1-GB234-L5)
On this one product, before October 2016, all of the traffic was coming in from the
~/product/aspx?id=1234 URL, but after that all traffic switched over to coming in from the
When I Google the Catalog #, the top result is the
~/store/a-great-product.aspx as well.
What makes Google go with one alias, rather than the other one? Anything with Google that would have changed the traffic pattern?