The New Rules
More major changes were announced at Pubcon and this got developers scrambling. It featured the WC3 and Bootstrap technology.
Progressive Web Apps
Then another Very Big Move came when Google announced the roll-out of their new platform, Progressive Web Apps which is based on their new Firebase platform.
The reason is simple, FASTER Mobile Experience.
Accelerated Mobile Pages
Shortly after PWA's came their newest, AMP.
A BIG feature was Google made these Open Source making them FREE with the right provider.
You no longer have to pay those expensive fees from the online guys or a webmaster.
In 2019 they announced Major Changes to their Web Crawlers and in early 2020 they began to lower the hammer, HARD.
And This Time you MUST PAY ATTENTION!