As indicated, check that the products are approved in Google Merchant Center > Products > List
If no, than resolve all issues listed in the diagnostics tab and make sure to follow all policies : https://support.google.com/merchants/answer/6149970?hl=en
If Yes, make sure you have created a shopping ad as instructed here : https://support.google.com/adwords/answer/3455481
When you say no clicks, do you have impressions? If yes than increase the bidding, if no, than recreate the campaign using the above tutorial.
If you continue to have issues, than it is recommended to contact Google directly in the top right corner of Adwords or Google Merchant > help
Hope it helps.
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