Abstract: A method and a computer system for determining the relevance of a text. The method includes: determining the similarity of the text to texts in a portfolio, where the text is compared with each of the texts in the portfolio as part of an individual comparison while determining a similarity value which indicates the similarity between the two texts in each case; assigning the similarity value to one of the two texts in the respectively performed individual comparison which was published at an earlier time or was first captured by a capture system at an earlier time; calculating a relevance value from the similarity values which were determined in the individual comparisons and were assigned to the text, and storing the calculated relevance value and/or transmitting the calculated relevance value to a communication end system via a computer network.