Google algorithm change: should you worry?

Updated: October 2020
Google is known to keep changing its search algorithm throughout the year, some minor changes occurring almost every day!

Google algorithm change
@dannysullivan, on Google search algorithm changes
Google claims that algorithm changes are made with the aim of giving more relevant results to searchers, rewarding genuine and good-quality content and downgrading poor content.

In August, Google is supposed to have made a major algorithm change (called broadcore algorithm change), and some big companies in the SEO field have reported that this change has impacted many sites.

What Google advises on algorithm change?

In March, Google gave some sane advice [in three tweets] coupled with an insight into its regular algorithm changes, and it is worth repeating :
Each day, Google usually releases one or more changes designed to improve our results. Some are focused around specific improvements. Some are broad changes. Last week, we released a broad core algorithm update. We do these routinely several times per year…. As with any update, some sites may note drops or gains. There’s nothing wrong with pages that may now perform less well. Instead, it’s that changes to our systems are benefiting pages that were previously under-rewarded…. There’s no “fix” for pages that may perform less well other than to remain focused on building great content. Over time, it may be that your content may rise relative to other pages.
The impact due to present change may not be directly due to change in the way Google ranks content quality. Danny Sullivan of Google Search, in his follow up tweets, referred to Google's search quality rating guidelines to know what Google considers as good content. He has hastened to say that the raters themselves do not influence the search at all. (You can visit here the ITB article deciphering the huge document called Search Quality Rating Guidelines.)

Believe Google. There is nothing to be done if your search traffic has increased or gone down in recent days. What you need to do is: 
  • keep posting content relevant to your target audience, and
  • keep posting good stuff.