They need to be posted WITH the photo, and not tagged on afterwards.
Not so- adding hashtags to the actual caption looks sloppy and very few people do that. Immediately commenting with your hashtags after posting works just as well, so long as you don't wait hours/days before adding them.
Some other comments in here are funny....IG will be dead soon? Hilarious! They're constantly updating with new features that make the platform even more attractive to photographers looking to grow their business. My engagement is WAY up after they added the "stories" feature, connecting with my audience in a more organic way and making more sales.
There are definitely a ton of people who do treat IG like a popularity contest, who buy followers or use apps that automatically interact with accounts to build their following (accounts with 100k followers, but only get 1-2 comments and a few hundred likes per post....), but a lot of people miss the point. I'd rather have 6-7k followers who I engage with and buy prints/workshops than a million fake followers just so I can brag about numbers.
Every so often there will be a thread discussing social media here, and it's very obvious who is out of touch with the benefits it can have for a photography business. Of course some of you don't care about business, and just shoot for fun- but don't dismiss instagram just because it's benefits aren't relevant for you.