Mobile first - site speed is a ranking factor
Google has officially announced that mobile page speed will be a ranking factor. The new “mobile speed update” will launch in July 2018 - So what does this mean?
According to Google, they “will create and rank its search listings based on the mobile version of content, even for listings that are shown to desktop users.”
This just means that you need to pay so much more attention to how the mobile version of your site is crafted.
Best way to go about it is to have a website audit done on your mobile site to know points for improvement in terms of speed, layout, design, user experience, and so on. Use the free Google Page speed tool found here.
These are the results for this website (bark.productions) - see if your's get's anywhere close. 80/100 is considered minimum.