Today most of the peoples are using Skype. It is one of the day to day options in IT industry. Skype is also promoting ads via Skype login. Sometimes we may get irritated or some wanted to remove it. The following is the option that helps you to remove the ads.
Tools -> options -> Privacy remove the check box on Allow Skype to use non-personally identifiable information about me when serving third party ads. Save and Enjoy Skype without Ads.
Refer below screenshot for your convenience.