Skills Gap
A skills gap is a gap between the skills an employee has and the skills he or she actually needs to perform a job well. Skills gaps vary depending on the job in question and the types of skills required for the job. For example, some employees come into the workforce lacking the collaboration skills required to be successful at their job; they can learn these skills through on-the-job coaching and instructor-led programs. Until they receive this training, there is a gap between the skills they have and those required to perform well on the job.
Source: https://trainingindustry.com