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.