Spelling mistakes in a CV are a red flag to any employer or recruiter. They show poor attention to detail and a lack of care and consideration. Even with spelling and grammar checking enabled on a word processor, taking a few extra minutes to read through your CV to make sure it is correct can be invaluable.
It is an unfortunate truth that many recruiters spend mere seconds looking at a CV. If it is not well laid out and to the point an otherwise good candidate can be overlooked. Not structuring a CV in a way that is easy to read and understand quickly, using confusing dates, or not putting information in reverse chronological order are common mistakes.
Too little or too much information
Your CV should have sufficient detail to highlight your skills, experience, and education in a concise way. If a CV is too short it may lack detail about what you actually did in your previous roles or what your achievements were. Conversely, an excessively long CV is equally off-putting and challenging for an employer to digest and compare to other applicants.
Vague or generic statements
Specifics are absolutely critical when writing a CV. Give actual examples of your skills and achievements and exact details of what you did. Generic statements not evidenced by experience or education will result in a CV that does not stand out and is easily disregarded by an employer.
Unexplained gaps in your history
There is nothing inherently negative about having a gap in employment or education. The main thing an employer or recruiter wants to see is that the period of time can be accounted for in some way, whether it be taking time off to travel or raise a family. Employers like to have the full picture before calling a candidate for interview and leaving a lengthy gap in your work history will raise questions about what you were doing during that period.