Click to move example in Roblox Studio.

ClickToMove.lua

local ContextActionService = game:GetService("ContextActionService")
local RunService = game:GetService("RunService")
local player = game.Players.LocalPlayer
local effect = game.ReplicatedStorage.ClickToMoveEffect
local heartbeatSignal = nil

local function OnClickToMoveTick()
	local hit = player:GetMouse().Hit
	if not hit then return end

	player.Character.Humanoid:MoveTo(hit.Position)

	effect.Position = hit.Position
	effect.Effect.Enabled = true
	effect.Parent = workspace
end

local function OnClickToMove(actionName, inputState, inputObject)
	if heartbeatSignal then heartbeatSignal:Disconnect() end
	
	if inputState ~= Enum.UserInputState.Begin then
		effect.Effect.Enabled = false
		return
	end
	
	OnClickToMoveTick()
	heartbeatSignal = RunService.Heartbeat:Connect(OnClickToMoveTick)
end

ContextActionService:BindAction("ClickToMove", OnClickToMove, false, Enum.UserInputType.MouseButton1, Enum.UserInputType.Touch)

ClickToMoveDrag.lua

local ACTION_CLICK_TO_MOVE = "ClickToMove"
local ACTION_CLICK_TO_MOVE_UPDATE = ACTION_CLICK_TO_MOVE.."Update"

local ContextActionService = game:GetService("ContextActionService")
local player = game.Players.LocalPlayer
local effect = game.ReplicatedStorage.ClickToMoveEffect

local function OnClickToMove(actionName, inputState, inputObject)
	if actionName == ACTION_CLICK_TO_MOVE and inputObject.UserInputType == Enum.UserInputType.MouseButton1 then
		if inputState == Enum.UserInputState.Begin then
			ContextActionService:BindAction(ACTION_CLICK_TO_MOVE_UPDATE, OnClickToMove, false, Enum.UserInputType.MouseMovement)
		else
			ContextActionService:UnbindAction(ACTION_CLICK_TO_MOVE_UPDATE)
		end
	end
	
	if inputState ~= Enum.UserInputState.Begin and inputState ~= Enum.UserInputState.Change then
		effect.Effect.Enabled = false
		return
	end

	local hit = player:GetMouse().Hit
	if not hit then return end

	player.Character.Humanoid:MoveTo(hit.Position)
	
	effect.Position = hit.Position
	effect.Effect.Enabled = true
	effect.Parent = workspace
end

ContextActionService:BindAction(ACTION_CLICK_TO_MOVE, OnClickToMove, false, Enum.UserInputType.MouseButton1, Enum.UserInputType.Touch)