For each of these types of information it is best to have the content built using a dedicated CMS tool so that the output of each can be styled in such a way that it responds effortlessly across devices.
A classic example of where this goes wrong is tables. You might be able to add a table in the wysiwyg editor of your website that looks fine on your desktop but which is cramped and practically unreadable on a mobile. Generic tools don’t work on mobile. A custom CMS tweak would have allowed table fields to be entered separately and pulled them out in a mobile friendly format for all users to enjoy.
Where content loaded onto a website breaks the design of the site on mobile and tablet devices, it can have a damaging effect on the level of trust that visitors subconsciously associate with your brand, event, and other online services such as event registration and online payment. Ultimately, by travelling the extra mile and making your content more accessible you are reducing the barriers to entry for your event, showing you value your visitors’ time, and ensuring a full and vibrant exhibition hall.