Google webmaster tools errors

the Mobile Usability section in my Google webmaster tools report for my website www.airport-transfers-falkirk.co.uk the theme shows 4 errors
Usability error
1 Viewport not configured
2 Small font size
3 Touch elements too close
4 Content not sized to viewport
how can you correct these errors ? It might be important for mobile SEO ranking

@photogold

This is not going to affect your SEO results. Here you can see what Google actually things about your website when searched on mobile:

“Mobile-friendly”