If I name my HTML file “Banks.html” located at http://www.example.com/Banks.html, but all the content is about Cats and all my other SEO tags are about Cats on the page, will it affect my page’s SEO?
Can you name your files whatever you want, as long as you have the page title, description, and the rest of the SEO done properly?
Page names are often not very representative of the page content (I’ve seen pages named 7d57As09). Therefore search engines are not going to be particularly upset if the page names appear misleading. However, it’s likely that the page name is one of many factors a search engine considers.
If there’s no disadvantage in naming a page about cats, “cats.html”, then do so! If it doesn’t help your SEO, it will make it easier for your visitors!