Pat the chicken thighs dry with paper towels, then season them generously with salt, pepper, and a pinch of paprika for color.
Heat a tablespoon of olive oil in a skillet over medium-high heat until shimmering, then carefully place the chicken thighs skin-side down. Sear for 4-5 minutes until golden brown and crispy. Flip and sear the other side for 2-3 minutes, then remove and set aside.
While the chicken sears, zest the lemon using a lemon zester and squeeze out about 1/4 cup of fresh lemon juice. Mince three garlic cloves and chop fresh herbs if using.
Pour the lemon juice into the slow cooker, then add the minced garlic, chopped herbs, and chicken broth. Stir gently to combine.
Place the seared chicken thighs into the slow cooker, skin-side up, ensuring they are partially submerged but not completely covered.
Cover with the lid and cook on high for 3-4 hours, until the chicken is tender and easily pulls apart, and the sauce is fragrant and slightly thickened.
Once cooked, carefully transfer the chicken to a serving plate and spoon the lemony sauce over the top. Let rest for 5 minutes to allow juices to redistribute.
Finish with a squeeze of fresh lemon and a sprinkle of herbs for brightness. Serve hot with your favorite sides like rice, greens, or crusty bread.