If you're talking about estimated searches for your keyword targets, it can be a good SEO method if you know how to use such keywords properly.
Many people think that as long as they mention a keyword in text, they will get something close to the monthly search volume of that keyword if they rank number one.
This is not true!
First, you're only going to get a percentage of the keyword's estimated monthly search volume if you rank number one.
Let's say you managed to do that.
But if you don't deliver on the search intent of the keyword, you're not going to retain your ranking.
Also, these monthly search volume estimates are exactly that — estimates.
Because when you use different paid SEO tools, their monthly search volume estimates vary quite a bit.
A lot of this has to do with the projections of keyword variations.
You can't base everything on the monthly search volume.
Instead, focus on just how relevant the keyword is.
According to paid SEO tools, having enough relevance is a good indicator that your target keywords are supposed to get traffic.
That's a good place to start.
But exactly how much traffic you get depends on how you target those keywords and how many other variations you rank for because of the quality of the content that you use to target your keyword.