Moodle has become popular worldwide in all levels of education. Although several studies have focused on analyzing the use of the Moodle platform as a whole, few contributions have examined the use of each activity included in Moodle, and its potential impact in learning. The survey collected data from 132 teachers in 43 secondary schools in Catalonia (Spain), considering teachers' individual information, teachers' frequency of use of Moodle activities, and teachers' perception of how the use of Moodle impacts learning. Findings from all teachers suggest that "assignment, quiz, forum, lesson, and external tool" are the activities used most by teachers, and "providing new educational scenarios" is the main perceived learning impact. Moreover, only teachers as users of a narrow range of activities perceived the teaching and learning impact of Moodle as significantly higher: "database" (creation and sharing information tool), "forum" (communication tool), "glossary" (collaboration tool), and "quiz" and "survey" (assessment tools).