Potential spam?

Sounds likeAdware has installed itself on your Mac...

EtreCheck is a simple little app to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac.

http://www.etresoft.com/etrecheck

Pastebin is a good place to paste the whole report...

https://pastebin.com/

Or use the paperclip at the bottom of a Reply to attach the full report here. :)

Workable but harder for me to work with...the Note tool on the bottom of this editor's toolbar, as shown in the image, to copy and paste the output from EtreCheck.

There is also free Malwarebytes which may take care of it...

https://www.malwarebytes.com/mac/

I thought etrecheck had links you click on to remove the Adware, but delete these files & Restart...

/Library/LaunchDaemons/com.SearchForWordsDaemon.plist

/Library/LaunchDaemons/com.MyMacUpdater.agent.plist

/Applications/MyMacUpdater

~/Library/LaunchAgents/com.SearchForWords.plist

~/Library/Application Support/com.SearchForWords/SearchForWords r

On these last 2...

~ tilde indicates hidden Home Library.

Apple hid the Users' Library folders...

Method 1:

1. From the Finder, select the Go menu at top of the screen, and choose Go to Folder.
2. In the window that opens, enter ~/Library, and click Go.

Great news & take care! :)