Final answer:
The incorrect statement about SEO is Option A, as long-tail keywords generally have a lower search volume but higher conversion rates compared to short-tail keywords, and not the other way around.
Step-by-step explanation:
Incorrect SEO Statement:
When analyzing which of the following statements about SEO is incorrect, we must look closely at each option provided. Option A states that long-tail keywords should be the focus of SEO keyword research because they have higher search volume than short-tail keywords. This statement is incorrect. Typically, long-tail keywords are more specific and less competitive, and they usually have a lower search volume but higher conversion rates than short-tail keywords. Option B is correct as mobile-friendliness and loading speed are indeed significant ranking factors for SEO. Option C is also correct; HTML components like headers and title tags are essential as they help search engines understand the content of a webpage.
Option D is a valid first step in the SEO process; thorough keyword research is critical to a successful SEO strategy. Lastly, Option E is accurate since SEO results typically take time and are not instantaneous.