Scrabble Tile Pendant Celebrity Twitter by ThePendantFactory
1) Tweeting only listings
If you only tweet links to your etsy shop, nobody is going to be interested and you'll find it difficult to get genuine followers. Twitter is all about building connections!
2) Setting up your account with auto DMs
A lot of people set up their accounts to automatically send a direct message to any new followers- usually saying something like 'Check out my etsy shop! I sell cute stuff shopname.etsy.com'. This irritates a lot of users and might make them much less likely to visit your shop.
3) Tweeting your listings directly @ other people
Yes- some people really do this and it's not cool (or likely to be effective). Plus you might get reported for spamming.
4) Complaining about your customers
I actually see this a lot and it always suprises me because they might be listening! It also doesn't create a very good impression for any of your twitter followers who might be considering purchasing something from you.
5) Not building up a follower base
A lot of people only have a couple of hundred followers, and wonder why twitter isn't doing much for them. Personally I recommend having at least a couple of thousand in order to make it work for you.
6) Tweeting to the wrong audience
As well as building up some good follower numbers, it really is critical that you are reaching the right kind of audience. If all of your followers are etsy sellers, you're unlikely to get very far with it (unless you sell supplies).
7) Using True Twit validation service
This is one of the biggest mistakes you can make if you're trying to use twitter to promote your shop to lots of new buyers (in my opinion). It's a service that automatically sends a DM to anyone who tries to follow you, asking them to click a link and confirm that they're a real follower. A very high percentage of people will just ignore the link and you'll lose a lot of potential followers.
Needle Felted Tweet Grey and Blue Chick by FeltMeUpDesigns
Update: I've had a few questions about how to use twitter effectively- you can find all the info on that in this article.
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Twitter Marketing- amazon.com