A "strong link" refers to a connection or bond between two things or people that is very solid, dependable, and influential. It implies a relationship that is sturdy, reliable, and has a significant impact. Full definition
It also supports previous research finding strong links between self - regulation and math skills. (sciencedaily.com)
I'm all in favor of developing strong links with the tech scene. (beyondthebookcast.com)
In the spaces between those compelling presentations, projects can develop to improve educational outcomes for young people, and build strong links in our communities. (schoolsweek.co.uk)