Under the motto of Fernando Pessoa: "My homeland is the Portuguese language", e3 was firstly founded as a publication dedicated to the dissemination of science in Portuguese, acting in the lusophone space and the community of Portuguese-speaking countries. It now opens to news worlds and new paths, reinforcing its long-term mission to harvest and disseminate knowledge and bring researchers and scientific communities closer together.

Published twice a year, it offers open, immediate and free access to its content, following the principle that scientific knowledge is freely available based on scientific, social responsibility and knowledge transfer to society.

The quality control of the submitted manuscripts is carried out by the Editors-in-Chief, by the Scientific Council, and by at least one double, and blind, peer review, or open peer review.