Domain age depends on Multiple factors Like

• Quality Content and unique content on webite

• Adding Content Regular with Keywords Optimization

• Working on ON page Optimization

• Working on Backlinks - like Comp links, other high quality links

Working on these regularly we can see growth of Website Domain Age

Thanks

Domain Rating Increases based on Multiple factors

• Need to push Quality Content frequently

• Targeting Right Keywords for each page with SEO Optimization

• Building Quality backlinks with high Domain authority

• Getting Do follow links & Getting links from .edu and .gov websites

• Working on Comp analysis and focus on their comp link

Keep continuing with these works - we can see an increase or growth in Domain level

Thanks, Hope Helpful