If you want to see it at account level(across all the campaigns), click the keywords tab > click on the Clicks tab to see most clicked keyword at top(descending) and least clicked keyword at top(ascending).
To access the keyword of any particular campaign/ ad group, first go to that specific campaign/ad group.
Archit, AdWords Rising Star, Community Profile
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Thanks Archit for your reply. I clicked the clicks but no keywords come up. I used the following link
This is the only link takes to clicks but it doesnt show keywords.