Having large groups of content that all revolve around the same topic will build more relevance around keywords that you're trying to rank for within these topics, and it makes it much easier for Google to associate your content with specific topics. Not only that, but it makes it much easier to interlink between your content, pushing more internal links through your website.
The days when internet browsing was done exclusively on desktop PCs are long gone. Today, more people than ever before are using mobile devices to access the web, and if you force your visitors to pinch and scroll their way around your site, you’re basically telling them to go elsewhere. Ensure that your website is accessible and comfortably viewable across a range of devices, including smaller smartphones.