From a search engine perspective, it is important that each unique page / bottom page can only be accessed via a unique address / URL. In cases where it can reach the same page through more addresses than one, you open up the risk of duplicate content ( duplicate content). To ensure that search engines and especially Google only associate an address / URL per unique page, you can use, for example, redirects ( 301 Redirect ) or Canonical URLs (Canonical URLs).
To help search engines index a site, consider using search engine-friendly addresses. To make an address more search engine friendly, one can think of things like:
Make sure it is short and does not contain myriads of directories or variables. Compare, for example: - www.example.com/fordon/tractors/ with - www.example.com/sweden/swedish/products/fordon/visa_page.php?typ=fordon&fordon=traktorer&sortering=50-11&lang=se
Use keywords in file names rather than numbers, for example. For example, compare: - www.example.com/gul-traktor.html with - www.example.com/visa.php?prod-id=50-11&lang-id=12