Certifications are written proof of your skills. They show employers that you have the expertise and are familiar with the tools of the job. They also highlight your dedication to a profession.

While many companies look at education during the hiring process, some managers check for various certifications to understand how experienced a candidate is. A certification might replace a level of education, or it could serve as an added bonus to convince employers to hire you. While many certifications require several months of studying — and might even cost a few hundred dollars — they’re often viewed as a faster and more affordable option than returning to school.

Here are four certifications to consider if you want to advance your career within your industry.

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