Last week I found a very informative UK website which shows a lot of different machine feet not only in text but also via a video-clip for each feet.
I think it is worthwhile sharing this website with you . Maybe your machine feet looks a bit different due to another brand sewing machine but still it can be helpful if you know how to use the feet you own or want to purchase.
Enjoy this learning opportunity from the UK website, click at the link beneath and scroll down a bit till you see the long list of the feet.
Learning how to use these feet is just one click away.