Can you help me understand the OFI Trade Alerts?

I’m new to options and I don’t understand Jim’s Trade Alerts. Where can I get plain-English explanations so that I’m more comfortable placing the trades?

Here are some expanded explanations of Jim’s trade alerts:

• overview of a typical put credit spread trade.
• overview of a typical call credit spread trade.

You can also read the definitions of basic options terminology at the Options Industry Council.