Images could increase file size. A document with huge file size may cause problem for navigation and scrolling with in document so it need to let users compress images in Microsoft Office Word 2013.also Sometimes you may need to save space in your hard disk and reduce your download size and time .You could compress some images without losing quality and reduce image resolution. Reducing image resolution may affect picture quality however you may have acceptable picture.
In order to compress a picture with in your Microsoft Office Word document
• You need to insert you picture and select it
• Go to Picture page and select Format Tab
• Choose Compress picture button
• It will pop up Compress Picture Window where you could change compress options then click OK to reduce image size