A template design is a solution that is not developed individually according to your requirements and wishes, but is bought or downloaded from the template catalogues. There are many platforms that offer template designs. For example, Themeforest website where you can find a large catalogue of designs for different projects.
Advantages of template design
Price and time. It will take less time to find and get a template than to develop a unique design. In fact someone has already draw the most popular pages and its components. The price of such templates in the range of $20-70.
Design flexibility. Universal design developers aim to provide a customer with the most extensive range of design pages. If you want a standart format project, you are satisfied with the design of template and its components, and you will not make any significant changes in the design, then yes, such a budget version can suit you.
Disadvantages of template design
Similarity. If a design is not developed individually according to customers requirements there is a huge probability to run into the same site design (or even 10 sites) surfing the Internet. Such site is not unique therefore it is unlikely that your visitors will remember it.
"Dirty" code. Template designers are primarily for commercial purposes, so the common problem of template designs is "dirty" code. Often sites-catalogues that distribute the templates "sew" invisible links to external sources (for example: sites for adults) into the code, thereby trying to promote their site at the customer’s expense.
Promotion in search systems. It is almost impossible to break into the top positions for high-frequency queries with a template design. Search engines know how to distinguish unique design from template.
Limited editing. This problem is common to all template sites. We often find that a client chooses a template and then tries to change it completely. Though changing the base code and updating the topic can cause internal errors or become impossible to fix. As a result, changing the color range, visual elements, blocks, etc., tends to waste time and money without giving the desired result.
Complex integration with corporate style. A lot of companies already have a certain brand style, logo and branding elements. All these elements should be on a new website as well. It is difficult to find a template design that fits the brand style.
Safety. Hackers like template sites because they can hack several sites at once if you don’t go to testing specialists who can prevent it.