Occasionally, you will stumble across a web page that has some pretty good information and is written well.

Then you look up.

You read the URL because you want to know where this wonderful article is posted and it doesn't make any sense at all that it is located on the website that it is.

If this happens, chances are you didn't click on that webpage from Google.

When Google ranks how well you are covering certain keywords, it definitely makes sure that it is a relevant topic for the website it is located on. It wouldn't make sense for Google to point to www.greatsewingpatterns.com for an article about installing a motherboard and CPU into a new gaming tower. It takes away from their credibility, and multibillion-dollar corporations don't do that.

Stick to the topic you chose, or make a new website to follow a new niche.