Do you know that images based posts get 120% more engagement than sans-image posts on Facebook, according a Wishpond study. By creating great images for your post, you can get more shares and increase organic reach.
If you want a free tool to create great pictures and images for your ads or posts, you can use “Canva.com“
You can create a bunch of multi-purpose graphics (simple posts to infographics) using Canva’s stock templates. Canva stocks Facebook post and cover sized canvases so your images are optimized.
You can upload your brand’s logo and include it on every image for branding, and add a hyperlink on the post and directly share it to your Facebook page from the app.
It is partially a free tool, but you can buy some pictures form them. If you don’t want to spend a penny, you can upload pictures from google images that have commercial use. A trick from 📷r/DigitalMarketingHack