I was reading about Langrangian points between Sun and Earth. I understood that $L_1$ Langrangian point was stable as the gravitational pull by Sun on the satellite towards itself was equal to the gravitational pull by Earth towards itself. Then I came across these two paragraphs (you can check it here)
L2 is located on the same line as the mass but on the far side. So, you’d get Sun, Earth, L2 point. At this point, you’re probably wondering why the combined gravity of the two massive objects doesn’t just pull that poor satellite down to Earth.
It’s important to think about orbital trajectories. The satellite at that L2 point will be in a higher orbit and would be expected to fall behind the Earth, as it’s moving more slowly around the Sun. But the gravitational pull of the Earth pulls it forward, helping to keep it in this stable position.
Now, I understand that planets in outer orbits revolve around the Sun slower than inner orbit planets, but how is slow speed reversing the nature of gravitational force of Sun on the satellite, I mean, like $L_1$ position experiences inward pull by the Sun, why then, $L_2$ point is experiencing outward push from the Sun? There should have been net inward pull by Earth and Sun together in the same direction.
Also, in the two paragraphs which I first mentioned, they talked about higher orbits. Now, what exactly is higher orbits? Higher in height relative to other orbits?, Or more farther in horizontal distance from the successive orbits around the Sun (if we consider all orbits lying on a horizontal plane)? . Can someone please explain these doubts?