The percentage shows the share of the population aged 25–64 who have participated in formal and non-formal learning in the four weeks preceding the survey. Formal learning provides the core knowledge, skills and competences that are recognised in the society, whereas their acquisition is usually formally assessed (preprimary and basic education; general and vocational education; higher education (incl. Master's and doctoral studies)). Non-formal learning is based on specific training programmes and intended for specific groups (occupational training, language learning, art classes etc.).
The indicator is also a measure of performance in the Estonian National Strategy on Sustainable Development.