Digital literacy is a critical competence for empowering citizenship in a digital world. It has become a key element in teaching and learning across the different educational stages that has been addressed since the last decade of the twentieth century within the field of open, distance, and digital education. The literature so far has not agreed on a common definition, but multiple international, national, and even local, frameworks exist to foster digital literacy and to evaluate and certificate it, especially with a focus on educators and students in different educational levels, but also with the citizen perspective. These frameworks are reviewed in this chapter, along with the evolution and conceptualization of digital literacy and some strategies to foster digital literacy in different educational sectors, with a focus on the educator as a key player in this fostering action. The most remarkable challenges for developing digital literacy for teaching and learning include the same conception of digital literacy, which is multiple and situated, the digital divide and the actual consideration of digital literacy as a social practice. Being digital literacy a transversal competency nowadays, clear implications for education can be drawn, such as reshaping organizations to the digital conditions, thinking on digital literacy as a collective effort, and enriching the global discourse through diversity in debates. Victoria I. Marín acknowledges the support of the Grant RYC2019-028398-I funded by MCIN/AEI/ 10.13039/501100011033 and FSE “El FSE invierte en tu futuro”. Linda Castañeda acknowledges the partial support of the project “Data Competency for Citizenship” DALI, an ERASMUS+ Strategic Partnership (KA204-076492), funded by the European Union.