Your logo's job is to represent the overall brand. 
This is a big responsibility. It is the symbol that carries the meaning behind the brand. 
However, that doesn't mean it needs to literally show the product (in fact, it's usually better if it doesn't).

Is it time to Rest or Revive your brand?

Brand Clarity for small business isn’t a race: a strong brand strategy aligns brand values with your message and target audience.