The second is to really avoid promoting yourself, or your services, or your business, in these groups when you first join them. Like with any social network, you really need to build trust. And the best way to do that is to simply engage with the content that’s already there. Start replying and making genuine comments about the content being posted by people that could be prospects for you.
Remember when you used to rely solely on search engines for traffic? Remember when you worked on SEO and lived and died by your placement in Google? Were you #1? Assured success. Well, okay, maybe not assured. Success only came if the keywords were relevant to your site users, but it was the only real roadmap to generating site traffic and revenue.