This study aims to provide an overview for educators and education policymakers on how to integrate learning technology and improve the skills of digital teachers, both digital immigrants and digital natives. This study used a systematic review method of literature published by research journals from January 2017 to August 2022. This study was guided by the PRISMA review protocol and used four databases: Scopus, Springer, ERIC, and DOAJ. This search focuses on determining areas related to digital competence, TPACK, digital immigrants, digital natives, and teacher digital competence. The results obtained show that there is 33 literatures (only 6%) of the total search results of 513 relevant literature. This study uses thematic analysis to code, organize categories, and develop themes. Based on the thematic analysis, these findings produce two main themes, namely teachers' digital pedagogy and the teachers' digital gap: digital immigrant vs digital native. This review adds to what has already been written by pointing the way for future research and giving ideas for digital skills training and monitoring its sustainability in the application of digital skills training so that teacher competency development can be improved as much as possible.