Hi Catherine,
Those are Bots or Web Crawlers, They are good things.
Web crawlers go by many names, including spiders, robots, and bots, and these descriptive names sum up what they do. They crawl across the World Wide Web to index pages for search engines.
Search engines don’t magically know what website pages exist on the Internet. The programs have to crawl and index them before they can deliver the right pages for keywords and phrases, or the words people use to find a useful page.
Most Bots are in locations with large populations – So some of the visitors from those locations are real potential customers.