Difference Between CPC, CPM and CTR in Google Adwords

CPC – Cost per Click – You are charged every time a user clicks on your ad, but not every time your ad appears in the search results

CPM – Cost per Impression – You are charged every 1,000 times your ad appears on Google whether it is clicked or not

CTR – Click Through Rate – Clicks/Impressions x 100 = CTR%