Clear language is important in all forms of communication.
The digital age however, falls short of value for effective communication.
The use of slang in the internet age is full of 'Thnks', 'Plz', 'Asap', 'Wft' and some even use 'K' instead of typing or writing a simple okay.
Organisations and companies today run their recruitment campaigns online and give similar platforms for applications to their vacant job opportunities.
You could be seemingly qualified and talented, but a simple use 'Thnx' instead of Thank you might be a disappointment to that potential employer upon reading your cover letter or mail.
The use of short forms of words and language isn't time or energy saving. It creates difficulty in communication.
It's unconstitutional and shuts doors to rare opportunities which knock only once. Not only for formal communication, but it also creates a floppy attitude on the recipient of a letter or message in an informal context.
Improper language is also a potential set back.
You might easily lose that job at your grasp for a slip of your grammar or lapse of your spellings of simple words. This can easily weigh down your good CV.
Getting rid of possible disappointment from language use, which could be distortion of intended message or even barricade of understanding is achievable. You should always stick to use of full sentences. It portrays good focus and seriousness especially in formal communication.
You can also ensure that the words are properly spelled by even inviting someone else to proof-read your work before submission.
If handwritten, you should not use crossed work with corrections on spellings or missing words for submission, it is advisable that you redo the work with great care to avoid previous mistakes.
Effective communication is the foundation for all pillars in society.