Network connectivity defines 2 things - just how many people shall be able to explore a given site simultaneously and how quickly they will be able to do that. When the connection capacity is low, for example, the maximum throughput could be reached with just several visitors checking out the website, so newcomers won't be able gain access to the webpages, or in an alternative scenario, all site visitors can have problems. If the capacity is sufficient, but the hosting server access speed is lower, it'll take longer for any page on the site to load and this could lead to visitors simply closing the site, if they notice that they need to wait for a minute or two just to view a couple of webpages. In this light, if you wish to start and maintain a profitable presence online, the hosting server in which you host your website should provide both superior access speeds and higher traffic capacity.