CPM stands for Cost Per Mille, which is the cost an advertiser pays for one thousand impressions of their ad. Impressions refer to the number of times an ad is shown to viewers on YouTube. The CPM rate can vary depending on the advertiser, the ad format, and the targeted audience.To calculate CPM, you can use the following formula:CPM = (Cost of Ad / Total Ad Impressions) x 1000For example, if an advertiser pays $100 for 500,000 ad impressions, the CPM would be:CPM = ($100 / 500,000) x 1000 = $0.20This means that the advertiser is paying $0.20 for every 1000 impressions of their ad.To maximize your CPM as a YouTube content creator, you can focus on creating high-quality content that attracts a specific audience. You can also use ads that are relevant to your content and targeted to your audience.Keep in mind that CPM is not the only metric you should focus on as a content creator. Other metrics such as engagement, views, and watch time are also important to consider when measuring the success of your channel.