If you need to make a poster to advertise your event, I would recommend using a website called Canva. It is free to sign up to and is really to use. Once you have created your account, you will see the “Create a design” page. If you scroll down, you will see “Poster” under ‘Marketing Materials’. This is the template I use to create posters.
Once you click on it, a new internet tab will open. Your blank poster will then be on the right, and the design options will be on the left. You can use posters that they have already created and amend the information to be your event information, or you can start from scratch and design your own. There are elements that are free to use, and also elements that you can buy to use, these are typically $1. Also, you can upload your own imagery to be included on the poster.
Once you have finished designing your poster, click on “Download” in the top right hand corner. This will then give you download options. I always choose “Image: high quality (PNG)”. It will then download and you will have an image of your poster that you can share all over social media.