Be Careful About Niching Down Too Much
Many online entrepreneurs get so hung up on narrowing down their niche that they back themselves into a corner to the point where their niche is now considered too narrow or too small for them to see significant success.
You want to make sure that your niche topic is broad enough that you are going to have a big enough audience to cater to so that they can generate the kind of revenue you need and hope to achieve.
Using the same example of golf, it would be okay for you to niche down into helping people with their short game or covering the various gadgets golfers may need. but if you begin to narrow down your topic so much that you only cater to left-handed golfers who want to buy a putter, you might be able to secure a top position and dominate for that topic, but your overall earnings would be lower than if you had broadened it a bit.
You could still target left-handed golfers or the topic of putting in general, but to combine the two narrows it down to the point where you are eliminating a lot of people from your target audience who may easily convert into buyers with your advice.
Not only will you struggle to find enough customers to follow your profiles and purchase products through your link, but you might even have trouble finding enough products that you can promote specifically for that narrow topic.
Some marketers get lucky and can expand from a too-narrow niche easily after they realized the mistake. But others may go and create a website with a domain focused on that narrow niche topic (like lefthandedputters.com) and realize they have nowhere to grow from there.
You don't want to have to start a new site and new content from scratch, so it's better to take some preliminary steps to make sure you have hit a sweet spot in niching down in the right amount.
You don't want to be too broad, either. Being too broad is a good way to get lost among a sea of competitors. You may struggle to rank well in the search engine results pages (SERPs) if you are constantly covering a topic as broad as golf.