2. Punctuation Handling
Click on the Punctuation fieldset to open it.
Punctuation can be a real problem for URLs. At a minimum it can cause confusion for your audience. At its worst, it can result in a broken link.
Spaces can also wreak havoc in a URL as well. At a minimum the space will be automatically filled with a %20 code, which can be really unsightly, especially if there are many spaces in a URL. At its worst, if the space isn't encoded, it can also result in a broken link.
Pathauto provides ways to configure how every different character is handled. The default settings will typically work just fine.