Yes, most commenters here are missing a legitimate concern about sharing confidential information in a public forum. If the talk is "How we do X at Y Inc" there's a legitimate concern; if the talk is "Learning to Love CSS in JS" then the manager may have ulterior motives.
My advice to OP: ask to walk through your presentation deck with your manager, both to get feedback and buy-in. Managers will be more invested in your success if they feel invested in what you're doing. (Suggestion: offer to plug your company's job openings with your manager's contact info.)
My advice to OP: ask to walk through your presentation deck with your manager, both to get feedback and buy-in. Managers will be more invested in your success if they feel invested in what you're doing. (Suggestion: offer to plug your company's job openings with your manager's contact info.)