ENGLISH:
The purpose of this study was to improve the vocabulary achievement of eighth-grade students at SMP Negeri 5 Mendo Barat through the use of advertisements, and also to find out whether there was a significant influence by comparing samples that use advertisements as a learning platform and those that not use advertisements as a learning platform. This study used a quantitative approach, focusing on experimental research with a quasi-experimental design. The researcher used purposive sampling technique and two classes were taken as samples, totalling 41 students, with 21 students as the experimental group and 20 students as the control group. The scope of this study was restricted to two areas: parts of speech and understanding the meaning, especially nouns, verbs, and adjectives. The test results were analyzed using Paired sample t-test and Independent sample t-test statistical analysis in SPSS 25. The results showed that students taught using advertisements as a learning platform obtained higher scores compared to students taught using non advertisements as a learning platform. This means that the alternative hypothesis (Ha) was accepted, while the null hypothesis (Ho) was rejected. It be concluded that there was a significant difference between students taught using advertisements as a learning platform and students taught without using advertisements as a learning platform.