Dashes vs. Parenthesis Confusion and Idioms

There seems to have been some confusion on dashes vs. parentheses.

Here are some tips to help out.

Dashes vs. Parentheses
Remember that dashes interrupt. Parentheses do too, but they include information that is related to the topic.

Here's some additional info on idioms.

Commonly Used Idioms

To "head off"