First we discuss about android, android is a O.S (operating system) which is based on linux kernel, it will be developed by Google and it is open source means any manufacture company use this O.S will free. But if you give Google apps than its mean you give the royality to Google means Google allowed to installed their app.
Stock android, it is fully completely develop by Google, which is found in Pixel phone. Google thinks that everyone was use stock android like how to build its can give to customer similar. There are also other manufacture company which give stock android phone.
Many of company modified android like Xiaomi give MIUI, Oppo give colours O.S, Huawei give EMUI, samsung give one UI, oneplus give Oxygen O.S. Basically company change interface, many of time there is additional feature which it get later update in stock android. For the additional feature which is not present in stock android, To solve the update problem Google make a android one program it's a special program in which company directly work with Google, Google satisfied those phone which is compatable for android one there was a little difference in android one than the stock android. Those phone which come in android one have two major software update and 3 year security patches means two upcoming android version for android one.
Android go, it actually normal android O.S but in this android many feature, functionality will removed and implemented only important things like android pie go edtiton in which you get less feature compare to android pie. It;s was develop for low hardware. It for those phone which have less storage 1GB or low range processor it can use less storage even the application also take less storage.
Stock android, it is fully completely develop by Google, which is found in Pixel phone. Google thinks that everyone was use stock android like how to build its can give to customer similar. There are also other manufacture company which give stock android phone.
Many of company modified android like Xiaomi give MIUI, Oppo give colours O.S, Huawei give EMUI, samsung give one UI, oneplus give Oxygen O.S. Basically company change interface, many of time there is additional feature which it get later update in stock android. For the additional feature which is not present in stock android, To solve the update problem Google make a android one program it's a special program in which company directly work with Google, Google satisfied those phone which is compatable for android one there was a little difference in android one than the stock android. Those phone which come in android one have two major software update and 3 year security patches means two upcoming android version for android one.
Android go, it actually normal android O.S but in this android many feature, functionality will removed and implemented only important things like android pie go edtiton in which you get less feature compare to android pie. It;s was develop for low hardware. It for those phone which have less storage 1GB or low range processor it can use less storage even the application also take less storage.