
Originally Posted by
Rostick
I`m talking like a total novice here, because I have zero interest in phones or tablets, but I could never see myself registering to a bookie from a mobile device.
And that is the BIGGEST mistake many webmasters make: looking at their website how they want to use it, but you have to look at your VISITORS preferences. Too often that differs a lot.
Nowadays people do almost anything on their phone or tablet. By ignoring them and not optimizing your site, you will loose a big chunk of traffic and thus revenue. On the other hand, your fellow webmasters which have optimized will happily convert your lost traffic 
Btw: according to the stats, my mobile visitors range from 18 to 45, so it's not only the youngsters that matter.
"Depend on the rabbit's foot if you like, but remember it didn't work for the rabbit." R.E. Shay