This is a survey paper of the developments on the geometric Bogomolov
conjecture. We explain the recent results by the author as well as previous
works concerning the conjecture. This paper also includes an introduction to
the height theory over function fields and a quick review on basic notions on
non-archimedean analytic geometry.Comment: 57 pages. This is an expanded lecture note of a talk at
"Non-archimedean analytic Geometry: Theory and Practice" (24--28 August,
2015). It has been submitted to the conference proceedings. Appendix adde