gain ground
US /ɡeɪn ɡraʊnd/
UK /ɡeɪn ɡraʊnd/

1.
to become more popular or accepted
:
•
The new fashion trend is starting to gain ground among teenagers.
•
The idea of working from home has gained ground significantly in recent years.
2.
to make progress or advance in a competitive situation
:
•
Our team is starting to gain ground on the league leaders.
•
The company is slowly but surely gaining ground in the competitive market.