I am having the exact same frustrations as @Jerry PuckettOne of my keywords has high volume which I like to monitor in my email to know what people are talking about, but rarely click.I am getting the same message that I haven't used it in a while.  

I'll keep monitoring the indicators and let the market tells me when to get back in.

All of my best deals have all been introduced to me by agents/brokers and the occasional wholesaler.Also, I constantly monitor the MLS and setup alerts in different areas I am farming and make aggressive offers quickly and methodically.

Then, monitor those listings over time and see if they are still listed or if the listings are pulled.  

Richard: Corelogic provides host of services for mortgage servicers, on of which is monitoring of real estate taxes so that the mortgagee doesn't lose its interest by virtue of a tax sale.

When tenants do disconnect them it is surprisingly easy to catch them as many take the entire detector down and never put it back while others remove the battery and unplug the detector.Our insurance company frowns on disabled smoke detectors  - not sure if they would use a disconnected detector to deny/reduce a claim, but I prefer not to test them.We are experimenting with a new detector which we can "see" with our building monitoring system.  

More information here if you're looking to get keywords out of GA.https://www.wordtracker.com/academy/learn-seo/analytics/monitor-with-google-analytics

We've got about 250 that we rent out and though your cash flow is higher, the maintenance and turnover expenses can get out of whack unless you monitor your team carefully or have a very good property manager.

Property managers may also implement a wireless toilet usage monitor.

So for now, think I'm gonna keep it, and monitor the callbacks for use.