1. Logo design and corporate identity are important ways for companies to promote public recognition and brand their external image. 2. Successful logos are memorable, effective, and relevant while avoiding too much detail, multiple colors, or trends. Unsuccessful logos have bad design. 3. Several prominent design firms like Landor & Associates, Chermayeff & Geismar, and Pentagram have helped design logos and develop corporate identities for many well-known companies over the decades.