Purpose of conclusions: summing up and moving the subject on
https://www.rlf.org.uk/resources/conclusions-what-they-do/
(Royal Literary Fund)
Example of a conclusion
What a conclusion should and shouldn’t contain
https://libguides.hull.ac.uk/essays/conclusions
(University of Hull)
Aims of a conclusion, with example
http://libguides.newcastle.edu.au/how-to-write-an-essay/conclusion
(University of Newcastle, Australia)