Noticeable (adjective)

1. Easily seen or noticed; striking.
2. Worthy of attention; significant.

Origin:

From middle english notisable, from old french notable, from latin notabilis "worthy of note".

Examples:

1. The change in his behavior was noticeable.
2. He had a noticeable limp when he walked.
3. The progress made by the team was noticeable.
4. The improvement in her grades was noticeable.
5. The difference in the before and after pictures was noticeable.