같다 is similar to 것 같다 (read about it here). There are, however, two differences between them and one of them is that 같다 is used with nouns while the other one is used with verbs. What you can use both of them for?You can use them both when you want to say that something looks or seems like something. The second difference between them is that 같다 can be also used when somebody wants to say, for example, that his/her bag is THE SAME as his/her friend’s.
제 가방이 친구 가방 같아요. / My bag looks the same as my friend’s bag. / My bag is the same as my friend’s bag.
커피 같아요. / It looks like coffee. / It’s like coffee.
제 = my
가방 = bag
친구 = friend
커피 = coffee