The links shown below some of Google's search results, called sitelinks, are meant to help users navigate your site. Google's systems analyze the link structure of your site to find shortcuts that will save users time and allow them to quickly find the information they're looking for. Google only show sitelinks for results when we think they'll be useful to the user. If the structure of your site doesn't allow google algorithms to find good sitelinks, or they don't think that the sitelinks for your site are relevant for the user's query, google won't show them. At the moment, sitelinks are automated.