You can read up on the changes below or check out some of the highlighted content in the newest Global Offensive blog entry.
Changelog for CS:GO for March 15, 2017
Released Canals, available in all game modes.
Visually upgraded the Phoenix Terrorist player model.
Added the Spectrum Case, featuring 17 community designs. In the Spectrum Case, the rare special item will be the second generation of knives in Chroma finishes.
Improved performance when using HRTF.
Fixed some cases where grenade sounds wouldnt play when they should.
Fixed teammate color problem when teammates select an invalid color.
cl_drawhud_force_radar can have three values: -1 to force draw no radar, 0 default, 1 to force draw radar even if other HUD is disabled.
cl_drawhud_force_deathnotices can have three values: -1 to force draw no deathnotices, 0 default, 1 to force draw deathnotices even if other HUD is disabled.
Added option to Game Settings to set Team ID to Always On ( cl_teamid_overhead_always ). Server can disable with sv_teamid_overhead_always_prohibit.
Added binding to Show Team Equipment ( +cl_show_team_equipment ) that will show teammates full Target ID, including equipment. Server can disable with sv_show_team_equipment_prohibit.
func_rotating objects no longer freeze and spam server console after rotating 1000 times
Thinned out corner when coming into hut from lobby, making it easier to peek into A site
Bullets now do more damage when shot through walls in hut
Raised rollup door in Mini, making it easier to see towards rafters
Removed three boxes on top of blue container near garage
Reduced C4 explosion radius from 500 to 400 units (Thanks NaVi!)
Made water outside the map deeper (Thanks hollandje!)
Raised arch on CT side of long A
Fixed some boost exploits
Railing on top of boost position near T bridge no longer blocks bullets
Various bug fixes