I can't understand the difference between Telegram and Telegram Road

Telegram Road offers the user applications (chatbots) which are perceived by the user as Telegram bots.  Telegram  is actually the only thing to be installed on the telephone (or computer). That's a cornerstone of the Telegram Road approach, opposite to the spread  of dedicated apps, which lead to clogging of smartphones due to their hunger of hardware resources.
On the Telegram Road service, chatbots run on the Telegram Road server, but are seen by the end user through Telegram, running on his/her own smartphone or desktop, with no difference.

What is Telegram Road for?

Telegram Road offers companies, agencies or associations the possibility to automate the interaction with their customers/users, leveraging a well-known technology  (messaging on a   smartphone) and leaving great freedom in the building of their own application (the "app").

What kind of applications fit Telegram Road?

All applications reflecting a cascading of question/answers, even  complex. These are typically static applications, whose structure  (the graph) does not change, but the variable part is the way the end user can cross the graph. Typical applications can be:
• skill tests
• surveys
• troubleshooting to support diagnostic on devices, appliances , machines, ...
and much more.

Another class of applications suitable to Telegram Road implementation are dynamic applications, for which the behaviour depends on data which are specific for the running user/session.
Examples of dynamic applications might be:
• databases
• agendas
• "decision support systems" , expert systems based on user's experience