To get the best promotions and reach for any marketing, using right social media sizes is very important factor. Each platform has their own size guide which is to be followed at the time of designing any creatives for marketing.
Along with the sizes its important to keep in mind the about of textual content that you are inserting into the creatives. It should not be more than 30% of the entire area.
Focus more on the image through visual communication and use text only when required for any kind of Call to Action, or for any important information like offers, registration, dates, venue etc.
Also the fonts that you use need to be bold and clear as majority of your audience browse these from mobile first and then on desktop. Below are the list of Social Media Sizes 2022.