.dbps in the url

Hi,

I have set my permalinks set to “post name”, but I am getting url as –

http://3dcadvisuals.co.uk/services/#sthash.tKUxk2qI.dpbs

what does the #sthash.tKUxk2qI.dpbs stand for?. How can i stop this from being displayed or is it normal?

Thanks.