The main goal of this paper is to define terms of advertising and social media, also to explain how advertising affects on people who are using social media, and their opinion about online advertising. It is described how to provide best description of product or service for customers, and in return to get feedback from customers. Advertising as a form of communication process should be informed, explained, create interest, stimulate desires, change attitudes and influence consumer behavior. There are many forms, rules and laws developed for online marketers. It is presented several types of social media which are most popular for advertising. Every social media has different rules and different prices of advertising. All these forms and rules should be followed in order to get quality advertise. Also, one of the crucial things is interaction and communication between marketer and consumer. The questionnaire attempted to get information regarding Internet consumer’s habits and thoughts on advertising effectiveness on social media. The vast majority of people are having opinion that online advertisements are not useful and some of them are even offended by online ads. People are usually do not use advertising to make easier their purchase decisions, and also consider that advertising are not informative. In general, people are disliking advertisements.