From the t&cs:
Participants can select to share the Contest on their own social network pages by clicking on the “share” button. RAYMOND WEIL Genève will grant one additional chance of winning to the participant for each sharing done. The contest will run for a period of 6 days
TL;DR: Optional share.
thanks for the post and answers.. regarding the share…
"LAST STEP, SHARE THIS QUIZ ON SOCIAL MEDIA AND TAG @RAYMONDWEIL"
does not specify the tag or that it is a step that must be completed in the terms which says it is something entrants can select to do for an extra entry