Click-through rate (CTR) could be a life of the share of clicks advertisers receive out of total ad impressions. "Impressions" refers to the quantity of times your ad is viewed. If your ad incorporates a log of impressions however no clicks, you may have an occasional CTR, that typically reduces the effectiveness of your campaigns.
Start generating urgency with count timers.
Use ad extensions to extend visibility.
Use symbols to induce attention.
Put the most keyword you are bidding on within the uniform resource locator of your ad.