Before you start spending money on SEO, getting a digital marketing agency involved or going down the PPC route - whether it is Bing Ads or Google AdWords - make sure your site is accessible.
Accessibility means standards so it will cover most of the same techniques as SEO does and it will improve usability. Plus if your site is inaccessible and users are directed to it from your ads chances are they will leave without doing anything (set up your reporting to see this). And no one likes to waste money or time.
If you thought it was just to do with people with a disability then you may need to think again. It can increase your bottom line, penetrate broader markets and reduce costs.
We can show you and have the stats to back this up.
If you want to know more send me a PM.
Some more information here: