The Purpose of this Research is to Investigate the Impact of Social Media Marketing on Brand Attitude and Market Performance. The Research Method is Descriptive and Correlational . The Statistical Population of this Research Includes Managers and Experts of New Businesses who are Founders of Companies or Entrepreneurs. Simple Random Sampling Method and the Sample Size is Estimated to be 80 People Using Morgan's Table . The Data Collection Tool is a Researcher -Made Questionnaire Whose Validity has Been Confirmed by Professors and its Reliability has Been Measured by Measuring Cronbach's Alpha Coefficient .Descriptive and Inferential Statistical Methods have Been Used to Analyze the Data Obtained from the Collected Questionnaires . The Research Findings Indicate that Social Media Marketing has a Positive and Significant Relationship with Brand Attitude and Market Performance ; In this Sense , Social Media Marketing Actions can Lead to the Promotion of Brand Attitude and Market Performance .