Difference between cut and print then cut

 With SVG cut files, you can use paper, vinyl, wood, fabric, iron-on, leather, and more. However, Print Then Cut with a Cricut is used with cardstock, paper, waterslide, sticker paper, or printable vinyl

This is where your design will be print out on your home printer first and then you Cricut will cut out the design. This is a great option for multi-color detailed designs. I have used the Print then Cut feature to make invitations, cards, gift tags, character shirts for my kids, stickers and more!

The term Print then Cut means that images are printed on a printer, then the printed page is placed on a cutting mat and loaded into the Cricut machine. The Cricut scans the registration box, and then cuts out the images. for more details visit this difference between cut and print then cut

In brief, the Attach tool keeps your shapes in the same arrangement when you send the design to the mat to cut. The shapes are still separate pieces, but their layout is frozen in place. The Weld tool unites two or more separate shapes into one single shape.