A low WordPress upload size limit stops you from uploading large files, plugins, and themes.
It’s necessary to increase the max upload size in WordPress or your server (or both) in such cases.
How to Check Your Maximum File Upload Size Limit in WordPress?
WordPress will automatically show the maximum file upload size limit when you are uploading images or media. To check it you can simply go to Media » Add New page and you will see the maximum file upload size limit for your WordPress site.
Contact your host
The easiest thing to do is just contact your web host. They will be able to quickly change it for you.