In one sentence, describe what the following article is about:

Your glass tile will come with instructions from the manufacturer and there may be specific installation guidelines. Read and follow the directions provided. The thickness of your glass tile may require a particular cutting tool, for instance, or the manufacturer may recommend a particular technique. Some manufacturers won’t provide a warranty for the materials you purchased unless you follow their specific guidelines for installation.  If you don’t feel comfortable with the installation after reading the instructions, consider contacting the manufacturer directly for more information. You may want to consider using a qualified contractor, carpenter or professional installer for this job. The number of tiles you buy depends on the size of the space and the size of the tiles you choose. Glass tiles are frequently used as backsplash in kitchens, as well as in bathrooms. However, glass tile is very versatile and can be used in many other ways. Measure the space carefully beforehand and purchase the tiles accordingly.  You can purchase glass tiles at most home improvement stores. Try to buy about 5% more tile than you need for the job to account for any errors that occur during installation, though if you're putting in a backsplash with many outlets or otherwise has many difficult cuts, allow yourself an additional 10%. The manufacturer’s instructions will elaborate on what you should expect from the materials. Depending on the type of tile, some variations in shape, color, shade and tone may be normal and should be expected. Sheet mosaic tiles will often have a mix of glass, metal and ceramic tiles. Confirm that the purchased materials meet your expectations before you begin the installation process. Check for any defective or broken glass, as well. Glass tiles with paper or foil backing should be checked carefully for manufacturing defects that will hard to spot until after it is installed. Small slivers of glass will be discharged as you make cuts, creating a potential safety hazard. Be very careful. It’s imperative that you wear some kind of eye protection or safety goggles when cutting glass tile. It’s also recommended that you wear heavy cloth or leather gloves to protect your hands from flying glass shards. Gloves will also protect your hands from the extremely sharp edges of freshly cut glass tile.

Summary:
Read the manufacturer’s instructions. Measure the space carefully and then purchase the tile. Inspect the tiles for consistency before you begin. Wear protective gear.