Strengthening writing skills in a second language is one of the most challenging issues. It's because many people are not able to write different texts even in their first language. Writing is a complex and important skill and only develops when students become familiar with how to write and have the opportunity to practice this skill. The current study aimed to investigate the effect of using Grammarly software on strengthening the writing skills of Advanced students in one of the language schools in Tabriz. The method of this research is experimental according to the studied groups. The population of Advanced level language learners in Tabriz Guftagoo Language Center randomly formed a statistical sample. After analyzing and comparing the mean scores of the groups, the effect of Grammarly software training on strengthening writing skills was confirmed. On the other hand, e-learning has increased students' interest in writing skills.