Recent changes to Google organic search?

[Teamzig]

We have a client's website that was on page 1 for 2 years, and then in September fell off while a new website with virtually no visitors and never showing in organic search before shot to #1. Never seen anything like it.

Today, my client is back where they were two weeks ago and the #1 listing I mentioned is not even on page 1 at all.  In fact it's at the bottom of page 2! It seems to us, having read about Google organic changes made around July 3rd, 2018, that even more emphasis is now on the domain name (all the results on page 1 have my client's keyword in their domain name) and the importance of H1 tags and Title tags has risen to trump many other factors.

Can anyone shed some light on changes you may have seen in the past few months? Along with huge changes to Adwords and AdGrants, Google seems all over the place (at least to us) and it is more challenging then ever.

Thanks!!