They are easy to measure. Employers can get a good idea of these skills by looking at your education, previous experience and certifications.
They are harder to evaluate. They can´t really be communicated well through your cover letter or resume. Instead, employers usually have to wait until an interview or your first few weeks on the job to get a good idea of your soft skills.
They are more difficult to develop. You´ll need to practice them over time in the real world with others.
They come naturally to some people while others may not have such an easy time with them.
They are generally learned through school, training or previous work experience.
They are interpersonal skills that can be used in every job. Some examples are communication, teamwork and adaptability.
They are more objective. This means that once you have learned the information or task you will then possess that skill.
They are concrete skills that are specific to your job and are required for you to actually do your work.