1. Describe the role that directories and pay-for-inclusion services can play in a search engine optimization strategy.

2. Explain how robots, spiders and crawlers work? (Hint: all of these terms mean the same thing, so just describe them as a group)

3. Contrast search engines with search directories.

4. Explain the benefits of being listed in a search directory.

5. Identify when to use pay-for-inclusion services.