Grammar Check

https://www.grammarly.com

Grammarly points out grammar mistakes and encourages you to use active voice.

Inverted Pyramid Style

https://ohiostate.pressbooks.pub/stratcommwriting/chapter/inverted-pyramid-style/

This website will teach you how to write in an inverted pyramid style.

Memo Examples

https://www.examples.com/education/memo-writing.html

This website provides examples on how to write memos.

Passive Voice

https://justpublishingadvice.com/what-is-passive-voice-and-how-you-can-stop-using-it/

Just Publishing Advice explains when it is appropriate to use the passive voice and when it is not.

Concise Writing

https://centerforplainlanguage.org/an-instant-way-to-shorten-your-sentences/

Center for Plain Language teaches you how to write more concisely.