Don’t be fooled by people trying to tell you that tracking SEO metrics based on keywords and keyword performance is obsolete. Keywords and the traffic they produce are alive and well and depending on the position (above the fold or below the fold) and the percentage of traffic they receive is tangible to assess conversion and performance benchmarks.
Over 80% of consumers hot on the trail of a product or service have a higher propensity of clicking the top 3 search results when presented with the top 10 websites for their query. If a user has to scroll below the fold the click through numbers taper down to the remaining percentages.
However, depending on factors such as:
1) the competition for the phrase
2) the relevance to the searchers intent and
3) the emotional click-triggers from the snippet/description in the search result (and how sticky it is) impact who gets the click.
Obviously, the more keywords that encroach on a topic, the higher percentage for conversion you have from those topics, when each of the pages becomes buoyant after gaining some authority in search engines (typically 2-4 months).