A lot of people just starting out have great ideas, and then take them over the top. Here’s what to avoid.
Keyword Stuffing – In the title tag, you re-use the keyword more than necessary, to a degree that it sounds unnatural.
Internal Link Over Optimisation – Multiple links, for example, to Detroit used cars, Seattle used cars etc, stuffed into the footer.
Unnatural Content Development.
If search engines see too much of this, they will penalise your site and users won’t link to you.