Greggs the baker or just "Greggs" as it is more commonly known, is the UK's biggest bakery chain, with hundreds of stores up and down the country. To help manage some of the ton of feedback they receive, Greggs mans its Twitter feed 7 days a week, and the way it handles customer complaints and queries on the platform is something a lot of other brands - big or small - could learn from, to help keep existing customers happy and help spread good experiences with them. Let's take a look at 6 ways that Greggs is killing it on Twitter...