From Wikipedia:In sewing, "notions" is the collective term for a variety of small objects or accessories. Notions can include items that are sewn or otherwise attached to a finished article, such as  buttons,  snaps, and   collar stays, but the term also includes small tools used in sewing, such as   thread, pins, marking pens and seam rippers.

Marjorie's description:  all of the above and much more.  A wide selection of supplies and tools that make sewing easier.  Maybe it's a needle holder to simplify changing the needle, or long-handled tweezers to go where fingers can't, or that handy spacer thingamajig for quickly positioning button-holes.   Or perhaps its that Third Hand (don't we all need one from time to time?)  If it can help in the sewing room, you will probably find it at Jacks.  And, of course, we do have buttons, zippers, bindings, rick rack, elastics, etc.  If you are looking for something specific that we don't have, let us know and we will try to find it for you.  WE'RE HERE TO HELP.