Why does my WordPress index has a category?

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Well I havent found why there’s a category to my homepage but I found the function is_home() and added it to my if:

if($category[0]->{'name'} !== "Blog" || is_home()){
      echo "document.onload = removeWhiteDiv();";
}
if($category[0]->{'name'} === "Blog" && !is_home()){
      echo "headerAnimation();";
}