This overview from Laerd Dissertation provides an outline of using convenience sampling and provides an explanation of the advantages and disadvantages of using this option.
"Convenience sampling is a type of non-probability sampling technique. Non-probability sampling focuses on sampling techniques that are based on the judgement of the researcher [see our article Non-probability sampling to learn more about non-probability sampling]. This article explains (a) what convenience sampling is and (b) the advantages and disadvantages (limitations) of convenience sampling."
Lund Research Ltd. (2012). Convenience sampling. Retrieved from http://dissertation.laerd.com/convenience-sampling.php
'Convenience sampling' is referenced in: