User blog comment:TawnyOne/Meta: Why does it exist?/@comment-2010873-20140327192508

The metagame exists just like tier lists. In a fleshed-out game like LoL there's so many variables in gameplay, items, and champion synergy that it's no surprise that some champions will be better suited to handle more situations than others. e.g. Thresh will always be a popular support because of his kit is loaded with utility (hook, shield, lantern, AOE slow, knockup, knockback, another AOE slow and nuke, and great harrass), making him well-suited for almost any team composition. The metagame highlights exactly which champions and game tactics are the most successful.