35 Customer relationship management, namely, engaging, retaining, reactivating mobile application end users; media buying, tracking and optimizing of mobile applications; operation of telecommunications advertising networks for others; offering and providing advertising and distribution of advertising material relating to mobile applications to users across various channels and systems; advertising consultation services, namely, selecting traffic source type for providing advertising and distribution of advertising material relating to mobile applications, namely, ad networks, ad exchanges, real time biddings (RTBs), publishers and social media, for running campaigns of publishers and content providers; optimizing advertising and customer relation management (CRM) campaigns for advertisers, application owners and content providers; providing services that enable media buying in order to place ads of various formats, namely, banners, video, interstitial, rich media and HTML5; advertising consultation services, namely, enabling campaign planning and execution for media buying for the purpose of re-targeting; advertising consultation services, namely, providing services that enable advertisers, application owners and content providers to interact with end users, distribute, advertise, promote and market their applications, content and services across various channels and systems and engage, retain, reactivate end users; providing services that enable campaign planning, media buying, tracking and optimizing of mobile applications by advertisers, application owners and content providers; advertising consultation services, namely, providing services that enable advertisers, application owners and content providers to select types of channels and systems for advertising purposes, namely, ad networks, real time biddings (RTBs), premium publishers and social media, for running their campaigns, providing services that enable advertisers, application owners and content providers to access channels and systems that perform best for their specific applications; providing advertising consultation services that enable advertisers, application owners and content providers to effectively distribute their budget among various computer network channels and systems