Search engine result pages (SERPs) can be very competitive.
Even if you write a ton of content, it does not mean you are going to rank. Google is known for introducing new rich snippets and information such as video and step-by-step content.
These changes to SERPs can have a dramatic impact on your strategy and should be monitored daily. Even if you rank number 1, your ranking still might be below the fold after ads and a rich snippet or two, which is why it’s so important to not just look at your rankings, but the actual SERP.