The beasts to our east: What are El Ninos and La Ninas?

We hear the names but what do they mean for our weather? And what does the Pacific have to do with our climate?

source https://www.smh.com.au/environment/weather/the-beasts-to-our-east-what-are-el-ninos-and-la-ninas-20201209-p56lya.html?ref=rss&utm_medium=rss&utm_source=rss_feed