Whats the difference between using brackets to add to table and using table.insert?

So today I came upon a different way to insert things into table which utilized square brackets

I don't fully understand what I should use and why they both do the same thing is there any difference? or any reason I should use one over one?

local Way1 = {}

for i,v in pairs(game.Workspace:GetChildren()) do
Way1[#Way1 + 1] = v.Name


end

for _,v in pairs(Way1) do
    print(v)
end





local Way2 = {}

for _,v in pairs(game.Workspace:GetChildren()) do
    table.insert(Way2,v)

end


for i,v in pairs(Way2) do
    print(v)
end