This study set out to find out how Nigerian small and medium-sized enterprises (SMEs) performed in relation to sustainable marketing strategies. According to the study, sustainable marketing techniques have a major impact on how well Nigerian SMEs function. The majority of small and medium-sized enterprises (SMEs) in Nigeria, was found out in this study to employ sustainable marketing strategies and understand their advantages. These advantages include the ability to present themselves as morally upright businesses, environmental preservation, improved business performance, a larger market share, competitiveness, brand equity, reputation, and increased customer loyalty.A contextualized and literature-based research instrument was used in this study to gauge how the "constructs" under investigation were applied. The study collected sample data from selected 250 SMEs in Nigeria using the survey method; all copies of the questionnaire that were given to the respondents were confirmed to be functional, yielding an effective response rate of 100%. Positive proof of the research instrument's validity and reliability was shown. After data analysis, the study's conclusion strongly affirms that sustainable marketing strategies have an effect on how well small and medium-sized businesses (SMEs) in Nigeria perform. The research's findings will provide feedback that will fill the knowledge gap and advance our understanding of SMEs in Nigeria. Additionally, the study will act as a manual for researchers and practitioners.