Main Features of Informal Texts (Spoken and Written):

Slang termsColloquialismsPhrasal verbs (verb + preposition)ContractionsAbbreviations/Acronyms/InitialismsEllipsisSwearing/colourful languageDiscourse particles (like, you know)Interrogative tagsDiminutivesSimple and compound sentence structure lack of complex/compound-complex sentencesInferenceInterrogative sentence typesNon-standard orthographyCapitalisation/Bolding/ItalicsExclamation marksFeatures of spoken discourseThe use of deictic expressionsThe use of personal pronouns (e.g. I, We)The use of active sentence structure as opposed to passiveBeginning a sentence with a conjunctionEmoticonsNeologismsIdiomsAssimilationElisionReductionShortenings