What is "pursue an agenda" meaning?

I have read a "pursue" word meaning here https://www.oxfordlearnersdictionaries.com/definition/english/pursue?q=pursue, but I can't understand the second meaning, especially one of its examples.

The meaning described there is:

to continue to discuss, find out about or be involved in something

And there is example below:

 to pursue an agenda/a strategy/a claim

What does the "to pursue an agenda" mean in the context of the world definition mentioned above?
To continue to discuss an agenda?
To continue to find out about agenda?
To continue to be involved in an agenda?

I'm not sure about correctness of all of these interpretations. I tried to turn on imagination, but I can't figure out the relationship of this word's description and the example given

Solution 1:

In the expression “pursue or push an agenda”, the term agenda is used in the following sense:

the intention behind what somebody says or does, that is often secret.

• They were pursuing their own agenda.
• I'm not trying to push any agenda here.

(Oxford Learner’s Dictionary)

Used in political and other contexts:

This weekend, sources at rival stores hit back, accusing them of pushing an agenda. From: Times, Sunday Times (2013)

But politicians have pushed the green agenda to the fore so most people are aware of what needs to be done. From: Times, Sunday Times (2007)

It's the same people pushing the same agenda. From: The Sun (2015)

(Collins)

Solution 2:

"Pursue an agenda" is an idiom, implying the narrow-minded pursuit of a specific goal. Probably most often used in a political sense, where a politician might "pursue an agenda" aimed at implementing some policy or law, though it would certainly be seen in some business contexts as well.