loading time is one important factor in SEO, if the site load slow then you might tend to lose visitor
Page Load time is one of the factors that influences your ranking on the search engines, so having a page that loads quickly will give you an advantage when trying to get ranked for your keyword
If you are using slow hosting server than it may harm your website datas and its indexing service, because webpage load time of a website is really mean for Search Spiders because it tells them the quality of a website so you have to look over your page load time when create any website.