The register you use can influence how your writing is read. By using more informal language, you sound more natural to friends and family etc. There's multiple ways to do that. Today we look at 4:
1. Idioms. Idioms are combination of words that don't have a literal meaning. Some examples:
"we had a blast" = we had a lot of fun
"it cost me an arm and a leg" = it cost a lot of money
"that was a piece of cake" = that was very easy