Technological tools have affected education just as all areas of life. Especially nowadays, technological tools are highly utilized in the effective regulation of the teaching-learning process. Web 2.0 tools are included among these technological tools. Web 2.0 tools are used in mothertongue instruction as well as in all disciplines. This study is an attempt to examine the experiences of teachers who use Web 2.0 tools in mother-tongue instruction. We used the phenomenological design, which is one of the qualitative research designs, in our study. We considered the criterion sampling method in determining the participants. As the data collection tool, we administered an interview form to the teachers. Since we could not hold face-to-face meetings during the COVID-19 Pandemic, we used online platforms to interview the participants. Content analysis was used to analyze the data. We analyzed our data through the MAXQDA qualitative data analysis program and presented the results in figures. One of the notable results of our study was that mother-tongue teachers used numerous and different Web 2.0 tools in mother-tongue instruction. Another significant result of our study was that Web 2.0 tools used by teachers made a major contribution to the development of reading, writing, listening, and speaking skills. In addition, we concluded that the use of Web 2.0 tools in mother-tongue instruction had various contributions to both students and teachers.