What does the idiom "Jump on the bandwagon" mean?

• Answer: To join others in doing something trendy.

• Jump on the bandwagon:
English meaning: to join an activity that has become very popular or to change your opinion to one that has become very popular so that you can share in its success.
Bangla meaning: জনপ্রিয় ধারায় শামিল হওয়া.

Example:
- After a couple of politicians won elections by promising to cut taxes, most of the others jumped on the bandwagon.

Source: Cambridge Dictionary.