Re: What sort of role web hosting play in terms of SEO?
Web hosting roles have become more prominent compared with the past, especially when you study some articles which explain how loading times of websites and pages can have impacts on their ranks, since the latest Google update. Of course using a reliable hosting account will not guarantee having top positions on search engines but after adding fresh contents to your website, in order to ensure the pages will remain easy to reach by people and web engines, using a top host will be great.
If you take a close look at information displayed in your Google Webmaster Tools account, you will find details about pages which have not been reached by Google and the parts of your site that are inaccessible. Usually, such issues might be related to the hosting accounts used or the segments may contain coding problems and errors in scripts which need to get troubleshooted. Using a hosting account that can ensure sites are uptime always can be part of SEO strategies.