Starting projects is easy. Finishing requires prioritization, problem solving, testing, revision, and the willingness to handle less exciting details near the end. Employers know this because commercial work is valuable only when it reaches a usable state.
A candidate with completed projects can discuss what changed between the first idea and final delivery. That conversation often reveals planning ability, persistence, and judgment.
Completion does not mean perfection. A modest project that is finished, documented, and understood can be more valuable than an ambitious project that remains permanently half-built.
When building a portfolio, optimize for meaningful finished work rather than a large collection of abandoned starts.