Trump uses tweets for two purposes. First is to inform the public. Second is to further his strategies.
An example is how the Squad of 4 started to attack Pelosi. Trump slammed the 4 on Twitter and caused Pelosi to jump in and start defending them. This had the effect of making these left extremist Dems the face of the Democrat party. How does that benefit Trump? It makes the Dem party unpalatable to a majority of Americans, which turns 2020 into a cakewalk for him.
An example is how the Squad of 4 started to attack Pelosi. Trump slammed the 4 on Twitter and caused Pelosi to jump in and start defending them. This had the effect of making these left extremist Dems the face of the Democrat party. How does that benefit Trump? It makes the Dem party unpalatable to a majority of Americans, which turns 2020 into a cakewalk for him.