Hello!
1.) Click on 'Export' in Map Maker.
2.) Once finished, head to FeralHeart > exports.
3.) Copy everything that was pasted into there (that's your map files) and send to a zip folder.
4.) Head to a file uploading site such as Mediafire and click upload from computer, and once done, copy the link and send it to others.
5.) They will have to download and put EVERYTHING into their exports folder.
Any more questions you can feel free to ask. c: