Consider these questions:

• Are there any questions?
• Is there anything I can do to help you?

Those are bad unspecific questions that often lead to no questions being asked and no help needed.

Yet, presenters ask that question all the time at the end of their presentations.

A great tactic – is to be specific. Here are some reframed questions:

• What are your questions about SEO, from my presentation? 
• Can I help you do X?

When the question is specific, we help our listeners think clearer.