Electronics is an important talent since it brings benefits outside of combat. The better your Electronics is, the better you will be at opening junk scattered in the deserts on planets you visit. They may look like broken down machinery but they contain secrets and items that can't be found anywhere else. When you open these secured objects, you gain experience as well.
You can also repair your vehicle, the Mako, with Electronics The Mako is not just for travel but for combat too, since it comes equipped with a powerful cannon to destroy giant enemies like Geth Armatures and turrets. These are powerful Geths and machines that can deliver massive damage to your vehicle, so if your Mako is destroyed, then you die in the game. Electronics can be a lifesaver in this situation.