Islam is the religion of Peace. It bases on the 5 pillars: faith, prayer, Zakat, fasting and Hajj. All of these pillars are our duties and each of them brings a lot of rewards when we perform it. Hajj washes out every previous sins and gifts great blessing. Hajj increases our harmony and patience and also strengthens our soil on the way of Allah.
Every Muslims seek to perform Hajj at least once in a lifetime. Unfortunately, some of them do not have any possibilities to perform it. Lack of health and wealth is excuse Hajj skipping. As Allah is Understanding and Forgiving He offers some substitute deeds, performing which you can get the same reward like after Hajj.