The first main way in which the film was marketed was through the means of posters. Many posters were released months before the release of the film in cinemas, with captions such as "IT ALL ENDS: 7.15". Not only does this caption supply the information that this is the last of the films, (also using capital letters to grab the viewers attention), but a date for the release of the film is provided. The date being there adds further information about the film. Also on the posters were close up photographs of all of the main characters and famous actors that will feature in the movie. The use of a close up allowed the characters' faces to fill up the entire width of each poster, allowing the viewer to only focus on the actor/character and the caption along the bottom. Below there are examples of the posters that were released in the upcoming months of the films release date in cinemas. The fact that there are so many indicates that the many actors in it were worth seeing, for they couldn't settle with a couple of posters.
The next way in which Harry Potter and the Deathly Hallows: Part 2 was marketed and promoted was through the means of trailers. Multiple trailers advertising the film served for different purposes. The first teaser trailer was to allow the consumers to understand that there is another Harry Potter film coming out later in the year (no specific date was announced, instead the text said 'Coming Soon'), and also establish their target audience. However, later on in the year, an official, longer trailer was released showing the main highlights of the movie, along with the age restrictions and the release date. Many more trailers were released as it got closer to the release of the film, in order to remind people to go and see it in cinemas and keep the excitement and anticipation levels up for the consumers. Also, due to the fact that it is the grand finale, it may interest those who haven't even seen all of the films, so they can know how it ends. This interest is provoked, once again, through the use of captions such as "IT ALL ENDS". Below is an example of a trailer that was released, and became popular through the use of advertising on social media.
The final way in which Harry Potter and the Deathly Hallows: Part 2 became popular through the use of marketing was through premieres. Often in film premieres, the cast and writers reveal a bit more about the film but obviously not enough to spoil the experience, but most likely enough to draw in the audience more and make them want to find out what happens in the final, and the fastest way in which they can do that is by watching the film (aside from, of course, reading the book on which the film is based on).
To conclude, Harry Potter and the Deathly Hallows had many different trailers in order to release more information each time to capture the attention of the consumers/audience, and revealing more by both the narrative and clips shown to get interest from either previous fans or even new fans that are simply interested in seeing the actors in it, or any other reason. The producers create multiple posters as main part of a scheme to get a wider audience. They do this by revealing different members of the cast and possible quotations from the film in large capital letter text in order to attract the attention of a consumer. They often use the main characters on different posters in order to gain more interest, and the more in which the actor/actress is known then the more people in which will become interested in the film. These ways are the most common ways in which to market a movie, and Harry Potter and the Deathly Hallows: Part 2 was no exception to these techniques, having done all of them in order to gain as much popularity in cinemas as possible.