21st-Century Literacies also known "New Literacies"
Traditional Literacy consisted of reading, writing and arithmetic (3Rs).
21st-Century Literacies consist of 9 skills as indicated below ranging from Information Literacy in the 80s, media Literacy 90s, Digital literacy 20s etc.
there is no common definition for the 21st-Century Literacies yet.
However, According to Ontorio Ministry of Education (2016:5)
Students with the 21st-century competencies will enable them to face complex challenges now and in the future. These competencies - knowledge, skills, and attributes that help children and youth to reach their full potential - are additional to the important foundational skills of literacy and mathematics, and to the core learning in other subjects
The above sourced from All things learning-WordPress - Educational Literacy for the 21st Century illustrates the essential 21st Century literacies and fluencies.
Literacy in its broadest sense is an ever-evolving topic as you will see as you read more: