Reasons why people use advertising on printed posters is to get the attention of their viewers, hopefully brining in potential clients, and to make money.  When printing a poster, it needs to be readable, legible, organized, and brief.  This gets your message across to viewers easily and quickly.

Design
Clear thinking is the first step towards a clear design for you poster.  After you know what your poster is going to be about it is easier to design.  You want to design your poster so it grabs the attention of the viewer.  There are all different sizes and shapes the you can choose from to make your poster unique.

A new design for posters that people can take with them is to have the fold marks already on them.  This way they can fold into a nice sized pocket brochure.  For posters that are going to be placed on windows it might be a good idea to have them printed on both sides of the paper so that the internal space of the room with the poster mounted on it features a message as well as the outside.

Choosing a Paper
There is a variety of paper that you can choose from when it comes to printing posters.  Card stock, satin paper, matte paper, gloss paper, and watercolour paper are some of your choices.  One common factor that all of these papers have is, is that it is all heavy weight paper.  

Watercolour paper carries a premium over other paper types because UV-resistant archival inks are used.  This means that the color should stay nice and bright on the page for at least 100 years – in most scenarios this will be more than adequate!  Watercolour paper is recommended for maps, historical images, and lithographs.

Gloss paper is the second highest quality paper you can choose.  Gloss paper is recommended for digital images and photography.  It is also UV-resistant and the ink should stay bright for at least 100 years also.

Matte paper is another good choice for photographs.  Not everyone likes to have the glossy shine on their pictures.  It is also recommended for maps and historical images and really just depends on the preference of the end user.  

Satin paper uses a dye-based ink.  This is excellent for vibrant art and photo reproductions.  Any type of image is appropriate for satin paper.

Last but not least is card stock.  It is ultra heavy weight paper and when printed on it creates great depth of imagery.  It is appropriate for all kinds of images.  It is on the lower end of the scale price wise but still does a very nice job.

So when choosing a paper to print posters on it is important to consider what you want your image to look like for a reasonable price.