Why the hubbub about Google+? The last thing entrepreneurs need is another social network to join, right? Weren't you just getting the hang of Twitter? Didn't you just start putting that Facebook business page together? social media marketing conference So why is Brogan back here telling you to get into Google+, and pronto?I've never made a prediction like this before. I'm not exactly Mr. Bleeding Edge. But what I've seen so far is that the new social network from Google has a lot of advantages that are worth thinking about, and entrepreneurial types should take a look-see.While the company tirelessly negotiated with the record labels to bring the same success to U.S. soil, Spotify had already started making inroads with Americans -- giving influencers and celebs like Ashton Kutcher and Miley Cyrus a test drive.Though the product speaks for itself, it didn't hurt that techies at Mashable, Techcrunch and CNET helped spread the word to early adopters. Last December, even the much-respected music critic Bob Lefsetz listed "Spotify In The States" as his number one Christmas wish. Besides the labels finally giving in, this word-of-mouth mentality helped the service gain traction and ultimately launch in the U.S. this past July.With Mark Zuckerberg being a big fan of Spotify since its early days (co-founder Sean Parker is an investor), Facebook is now reportedly planning to launch its own music service at the F8 Develop Conference in San Francisco on Thursday. If it does, it could help third-party music services like Spotify tap into an even bigger audience of 750 million users.A few days after our launch we ran a campaign on Twitter to hand out invites to Spotify. effective social media marketing We asked users to follow our new @SpotifyUSA account and tweet with the hashtag iwantSpotify as part of their message. We gave the first 1,000 people who did that an invitation. This helped us grow our new U.S. Twitter presence, get new users and create buzz on Twitter all at the same time.