How do I Speed Up Magento 2

Magento 2 site speed is an important factor for Google to decide the rankings! Hence it is important to speed up Magento 2!

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How to Speed Up Magento 2:

Update Magento 2 version
Switch to PHP 7
Enable Varnish Cache
Set Flat Categories and Products
Advance Javascript and CSS
Set up Content Delivery Network
Turn Production Mode on
Use a lightweight theme and optimized images
Check the 3rd party extensions for bugs before installing them in the store.

For the detailed implementation of the above steps, check How Do I Speed Up Magento 2