For both FLR(M) and ILR, the application forms asks what ties you have to your home country (family, friends, businesses, property etc.) - this is to see whether, if the visa was refused, it would be possible for you and your spouse to move back to that country to live instead of staying in the UK, or if it would be physically impossible for you to return which means they may have to grant the visa because your life would be in danger otherwise (i.e. your country is war-torn or corrupt, or has no infrastructure, or you would end up destitute and homeless if you had to leave the UK).