This is the 366th most frequent German word.
mittlerweile
Meanwhile.
In this context, 'mittlerweile' indicates the idea of progress over time, showing that the subject has accumulated knowledge as time has passed.
Ich habe mittlerweile viel über das Thema gelernt.
By now, I have learned a lot about the topic.
In this sentence, 'mittlerweile' is used to denote an advancement or improvement that has occurred over a certain period of time.
Die Technologie hat sich mittlerweile stark verbessert.
The technology has significantly improved in the meantime.
Here, 'mittlerweile' highlights a state of change or development leading to the acquisition of knowledge about the solution.