Examples of Posts for Social Media Graphics
You can use either Photoshop or Adobe Spark to create this images
Cover Photos
You can use the templates: Here
Sizes (basically keep everything at a 16:9 Ratio and you should be golden)
Facebook: 1920 x 1080
Google +: 1080 x 608
LinkedIn: 974 x 330
YouTube: 2560 X 1440
Please specify a listing URL.