Fowl adenoviruses (FAdV) are significant infectious agents infecting wide range of poultry host including parrots, falcons and ostrich having a significant negative economic impact on the global poultry industry. Because FAdV strains are so widely dispersed, the majority of avian species are susceptible to infection. Five species and 12 serotypes (A–E; 1–8a and 8b–11) make up the FAdV classification. As FAdV strains are so widely dispersed, the majority of avian species are susceptible to infection. Chicken production can be affected by a number of syndromes brought on by fowl adenoviruses (FAdVs), including Inclusion Body Hepatitis (IBH), Hepatitis-Hydropericardium Syndrome (HHS) and others which can result in significant financial losses across the world. Because fowl adenoviruses (FAdVs) are more common than occasional outbreaks and there are differences across experimental studies, the stand-alone pathogenicity of FAdVs has been a topic of discussion for a while. However, during the past 20 years, a global pattern of FAdV-associated disorders has emerged, with epidemics of inclusion body hepatitis that are more widely dispersed geographically and hepatitis-hydropericardium syndrome occurring more in Asia. When Adenoviral Gizzard Erosion (AGE) first appeared in Asian and European countries, the spectrum of disorders was fully completed. Poultry industry's shift to highly specialised genetic breeds and strict biosecurity measures also contributes to the rising prevalence of diseases linked to FAdV. Additionally, increased biosecurity regulations have resulted in breeding stocks with weak immune systems, putting broilers at danger from vertical FAdV transmission. Therefore, in the future, breeders should have appropriate antibodies before production, and vaccination should be employed as a part of prophylactic efforts to safeguard progeny.