You will hear a lot of different strategies folks recommend.
Consistent signals,,can be both good targets and Junkers.
Inconsistent signals can be Junkers and good targets.
Remember a lot of things can make a good target yield an inconsistent signal,,like depth,,maskers like iron,,even other nonferrous.
Using a stock sized coil in an area with trash and or nails/iron,,,remember a lot of things can be under your coil affecting your overall signal,,,thus a very good target's signal could be skewed,,, making you think say a junker.
Site detecting history,,I weigh this heavily when making decisions on what signals I dig.
Some sites you would be spinning your wheels moreso digging every single nonferrous target,,but some sites for me allow me to be more open for digging about any signal.
I have heard the same said about gold jewelry,,that is sounds more pure signal wise,,,,I don't believe this for one second.
To each their own though,,,main thing is to have confidence in whatever system you use to decide to dig targets.
It just takes one really nice find,,,and your system in your own noggin,,,is the right one for you.
Who is to argue or dispute..if you got a find of a lifetime.
Certainly not me.