The answer to 'drip edge missing shingles' is that a missing drip edge can allow water to get under the shingles, leading to leaks and damage. Drip edge is an essential roofing component that helps direct water away from the roof edge and into the gutters. Without it, water can seep in and cause the shingles to lift, curl, or even blow off in high winds.
Fixing a missing drip edge is typically a job for a professional roofer. Trying to install it yourself can be tricky and risky if you don't have experience working on roofs. A roofer will be able to properly secure the drip edge and ensure it is integrated correctly with the rest of the roofing system to prevent future issues.