If you review a document, it means you read it and examine it (and maybe have some ideas to improve it) - but you don't make any changes.
If you revise a document, it means you change the text to correct errors or make improvements.
When preparing for a test, it's a good idea to study the material again in order to refresh your memory. American English speakers say you are reviewing for the test. British English speakers say you are revising for the test.
If there is anything geeky that you could probably buy on etsy then it must be an R2D2 skirt which is of course designed after the iconic character and droid from the popular Star Wars movies. The picture shows a woman wearing a blue, black and white dress that looks like the iconic robot. R2D2 is probably the most enduring character in all of Star Wars canon as he can be seen in all six movies in both the sequels and the prequels. Any fan boy of would be delighted to see this dress worn by a girl or their imaginary girlfriend for that matter.