In my career I got quite some technical certifications. Any cert shows you are taking your job seriously and you are willing to learn.

The following three certs helped to show I know my field really well and these separated me from others that just say they know it. Cisco CCNA/CCNP, Linux institute LPI and Agile Alliance certified Scrum master.

Later on I used certifications to quickly pivot into a niche, sometimes when already practicing the role. Architecture (togaf) and product management.