Mesh-networking kits like this Orbi Home WiFi System are designed to create multiple points of access for a Wi-Fi network, which means they can spread coverage over a wider area. If you live in a multi-level house or have a small business with multiple floors, this might be what you need to improve your shoddy Wi-Fi connection.
The Orbi AC2200 system is a great choice because it’s fast, reliable, and this version is currently selling at its lowest price since it was introduced in March. It also has great reviews from the likes of CNET and The Wirecutter among others. At this price, the AC2200 version is $50 off the slightly more powerful AC3000, but the only difference there is the AC2200 can cover up to 4,000 square feet instead of 5,000. There’s also an even less powerful model listed on the product page, but this deal puts the AC2200 version at the same price, so it’s not worth the step down in quality.