A keyword is not valuable simply because it describes what you sell. The real question is what the person behind the search is trying to achieve.
Recognise different levels of search intent and begin separating searches that merely relate to your business from searches that could realistically create a lead or sale.
Every search has a reason behind it.
Someone opening Google usually has a task, problem, question or commercial need in mind.
Keyword research therefore should not begin with a giant list of words. It should begin by asking what the searcher is trying to accomplish.
Learning something
The searcher wants information, education or an explanation and may have little immediate buying intent.
Evaluating options
The searcher is comparing providers, products, prices, approaches or alternatives.
Ready to do something
The search suggests a stronger intention to buy, book, enquire, call or request a quote.
Consider three searches for the same service.
A search can be perfectly related to your subject while still being a poor place to spend advertising budget.
Read each keyword as if it were a customer sentence.
Information, a product, a provider, a comparison or something else?
Relevance must connect to your actual offer.
Buying intent can vary substantially even within the same topic.
Commercial potential matters because Google Ads traffic has a cost.
Classify five searches.
Choose one product or service you sell. Write five searches a potential customer might use and classify each as primarily research, comparison or action intent.
Good Google Ads keyword research starts with intent. The most useful keyword is not necessarily the one most closely related to your industry — it is the one that connects the right searcher with a commercially valuable action.