innovative	original and interesting
unsurpassed	the best there is
to leave other things standing	to be much better than other things
to put/leave other people in the shade	to make other people seem insignificant
rock-bottom	extremely low
slashed	dramatically reduced
bargains galore	a huge number of products on sale at ridiculously low prices
to pamper oneself	to treat oneself with something luxurious
to indulge oneself	to allow oneself sth enjoyable
sumptuous	rich and special (about food/furnishings)
opulent	rich and special (about lifestyle)
in the lap of luxury	in a very luxurious way
medically proven	shown by research
state-of-the-art	uses the very latest technology
to stand out in the crowd	to be noticed
tantalisingly	temptingly
fetching/alluring	attractive
alliteration	repetition of a sound
billboard	very large board used for advertising
trailer	brief excerpt from a film, TV or radio programme which are used to advertise it
sky-writing	words written in the sky using smoke from a plane
sandwich boards	advertising posters hung at the back and front of a person who then walks around a busy area
to plug	advertise (colloq.- robiś reklamę, lansować)