Talk can be formal while chat is informal.
It means "talk to you", where "you" is informal, and plural.
what is informal education What a stupid answer ^^^ An example of formal education is school. School is formal because you go there to learn. Rather than informal where you learn things by events that happen around you. When you learned how to talk, unless under a 'talking aid' (something to teach you how to talk), it came by informal education because your parents/guardian talked to you when you were little.
A talk gives the idea of an informal discourse a speech describes a formal occasion as in a debate.
you can use informal communication because your friends and mates know what you are talking about, but if you use informal communication to people that don't talk like that then they wont understand to use can use it with your mates and family but not other people.
To talk a lot in an informal way, often about things that do not matter
Wnai siarad hefo chdi fory (informal)
Enikku thankalodu (formal) or ninnodu(informal) samsarikkanam
Quiere usted/quieres hablar conmigo (formal/informal)
Assalamualaikum and a very good morning to my principal
The interview is casual therefore you can talk/write informally.
Informal communication might include a casual conversation, emails, text messages, or Facebook messages. Typically, casual conversations involve humor and small talk.