By default in my store the head title of each page is different but at the end it has a store name for example
<title>Teddybear shop, buy teddybear, toys - TOY STORE</title>
I think it is not good to have a store name by default at the end of each generated head meta title. It does not have keywords in its name. What do you susggest. Do you think that the store name could decrease the ranking?