Answer
$-Advantage:\:Easy\:to\:implement\:and\:select\:sample\:elements.\\-Disadvantage:\:Randomness\:is\:compromised.$
Work Step by Step
$The\:advantage\:of\:systematic\:sampling\:is\:the\:ease\:of\:selecting\:$
$the\:sample\:elements.\:The\:systematic\:sample\:is\:a\:sample\:$
$obtained\:by\:numbering\:each\:element\:in\:the\:population\:and\:then\:$
$selecting\:every\:third\:or\:fifth\:or\:tenth,\:etc.,\:number\:from\:$
$the\:population\:to\:be\:included\:in\:the\:sample.\:This\:is\:done\:after\:$
$the\:first\:number\:is\:selected\:at\:random.\\The\:main\:disadvantage\:of\:the\:systematic\:sampling\:is\:that\:$
$the\:randomness\:in\:the\:sample\:is\:no\:longer\:carried\:out\:and\:hence\:$
$it\:is\:compromised.$
