Understanding the importance of islamic greetings

Salawat~~Asalam alakum, Asalam alakum wa rmatullahi, asalam alakum wa ra matuallahi wabarakathu: I few hadiths that guests may be aware of that could influence the idea the greeting is important and should be done well! Understanding the importance of islamic greetings..Many other points can be mentioned besides the few collected in the video such as the directions being precise from Prophet Muhammed(dua) as to what is the minimum in a proper greeting and reply to muslims, the fact that we do not have a right to expect one another to have good intentions so abbreviations could mean anything, also seemingly stingy to get reply with abbreviations to guest if they see we are capable of typing long sentences to chat and the greetings is mandatory etc, and many other points as far as guests being disappointed when they love the greeting as a new muslim. Take Care