The theme of this paper is the deviation from the standard language norms in advertisements. For this purpose, the theoretical presentation of advertisements, the conceptual definition of advertisements and the historical development of advertisements is presented in the paper. It also refers to the role and content of advertisements as well as to the various techniques and strategies used by advertisers in order to obtain as many customers as possible. Manipulation is described as an integral part of advertisement that surround us. Furthermore, the paper also mentions functional styles: administrative-business, journalistic, literary, scientific and conversational functional style and their connection and coherence in certain parts with advertisements. The central part is the research part; examples of deviations from the standards in advertisements divided into spelling and grammar errors. There are also mention of deviations from the lexical norm expressed by the excessive use of foreign words in Croatian advertisements, followed by the conclusion in the function of synthesizing the research of current Croatian advertisements in theory and practice.