I prefer to use "-" and "|" together whenever possible in the interest of "User Experience". What I mean by that, is I believe the variety of using 2 different separators adds context to the human subconscious. So I will use the "-" to seperate my keyword from a call to action or secondary keyword, and the "|" to further separate the brand or business name because it is slightly different content than the keywords/cta.

Example 1: A cool device - Fix your problem | MySite

Example 2: A cool device - Fix your problem - MySite

I believe that example 1 is easier to conceptualize. It differentiates the brand name from the rest of the title more efficiently. This in no way affects SEO, but anything to do with the subconscious of the human mind will affect CTR and that in itself is important to SEO. Minor details here :)

I prefer to use "-" and "|" together whenever possible in the interest of "User Experience". What I mean by that, is I believe the variety of using 2 different separators adds context to the human subconscious. So I will use the "-" to seperate my keyword from a call to action or secondary keyword, and the "|" to further separate the brand or business name because it is slightly different content than the keywords/cta.

Example 1: A cool device - Fix your problem | MySite

Example 2: A cool device - Fix your problem - MySite

I believe that example 1 is easier to conceptualize. It differentiates the brand name from the rest of the title more efficiently. This does not directly affect SEO, but anything to do with the subconscious of the human mind will affect CTR and that in itself is important to SEO. Minor details here :)