World TOP3 are American universities - Harvard University, Stanford University and Massachusetts Institute of Technology. Polish TOP3 are University of Warsaw (342nd place in the world),  Jagiellonian University in Kraków (380th place) and the AGH University of Science and Technology (572nd place).

The ranking methodology considers three indicators: visiblity/impact (number of external networks/subnets linking to the institution's webpages), transparency/openness (number of citations from university Top210 authors, excluding the first 20) and excellence (number of papers amongst the top 10% most cited).  It is the first indicator in which TUL has recorded such a large increase (from 6239th to 1121st place) moving university up 775 places in the general classification.  

The Webometrics Ranking of World Universities is an initiative of the Cybermetrics Lab, a research group belonging to the Consejo Superior de Investigaciones Científicas (CSIC), the largest public research body in Spain. It is attached to the Ministry of Education and its main objective is to promote scientific research.

More information (https://www.webometrics.info/en)