Acquisitions are the name of the game in Boston tech this week. Here are three deals that showcase where innovation is heading: Newton-based TripAdvisor has acquired New York’s Wanderfly to boost its online recommendations for travel. Burlington-based Nuance Communications is buying J.A. Thomas and Associates, moving deeper into health care. And Burlington software startup Veracode is acquiring Marvin Mobile Security to capitalize on the enterprise mobile-app market. So the key themes to watch are social travel, health tech and mobile apps for businesses.

Meanwhile, in biotech news, Cambridge-based Sarepta Therapeutics reported promising long-term results in a key clinical trial of its drug for Duchenne Muscular Dystrophy. Sarepta’s stock price jumped from about $15 to $40 on the news.

Our deal of the week is a $38 million funding round for Dyn, a Web infrastructure company in Manchester, NH. Dyn has been around since 2001 and bootstrapped itself to profitability before taking this growth financing from North Bridge Venture Partners.

And finally, angel investors continue to play a crucial role in the startup ecosystem. This week Xconomy has profiled over 30 of the top angels in New England. Collectively they’ve helped companies like Care.com, Endeca, Ironwood Pharmaceuticals and Zipcar get off the ground. And there should be a lot more where that came from.