As an evaluation skill, relevance is one way that you can prove that a source is valuable. Relevance is the easiest of the evaluation skills to use and should be relied upon if you cannot say anything else when evaluating the source.
Relevance is a statement about how useful or helpful a particular source is in provide information about your topic.
If a source is helpful in providing any information about your topic, it is considered to be a relevant source.
You can also argue that a source is relevant if you found any of the following during your analysis of the source:
Demonstrating source relevance in your writing:
Pliny’s account is particularly relevant to the issues of public entertainment in Roman society and Roman attitudes towards gladiators because he witnessed many such events firsthand.
The photograph was taken the day after the bombing of Hiroshima and it is a useful source to show the effects of the destructive blast.