Name and explain 1 reason why having a flawless grammar is important in business English

"The grammar reflects the credibility of the business." The grammar is impeccable in business english to transmit trust, maintain a good reputation and communication between its representatives will be successful.

What mistakes should you correct in your Résumé? What, in your opinion, is the hardest part of writing a Résumé?

The errors on my resume were grammar and non-parallelism. The hard part of writing a resume is when you have no work experience and no information to write on the resume.