It means that once FLV Runner Toolbar is installed to your browser, your home page, search engine and New Tab pages will be changed to its own. Usually one gets redirected to search.conduit.com. It might also be that third parties web pages will be advertised and redirected to, e.g. akaqa.com.
While the toolbar itself is not malicious the search page it advertises might lead to various infections. The company behind the application earns money from advertisements therefore when displaying the search results; you will get advertised links mixed with the actual results. There is no way how to distinguish between the two which makes it very likely for you to press on the promoted link. The company does not take any responsibility for the third parties content displayed, and some of the links advertised might be corrupted and lead to malicious websites.
It is highly recommended to remove FLV Runner Toolbar as soon as it has been spotted. Most likely you did not even install it yourself. Usually adware and browser hijackers like the latter are distributed bundled with freeware or shareware. They are also programmed to particularly difficult to remove. If you do not see FLV Runner Toolbar in Control Panel Add and Remove programs you may wish to remove any unfamiliar applications. Yet the most effective way for getting rid of similar infections is to use special antivirus tools, like Spyhunter. Even if you choose to remove the application manually, do not forget to perform a full system scan afterwards to ensure no harm was done to your computer.