Sometimes different spellings of a single word arise. Such is the case with embed and imbed.

The verb embed means to root, plant or place something deeply within another thing. For example, The United States media often embeds reporters within military units during war.

Imbed means exactly the same thing and is merely a variant spelling.

One spelling is no more correct than the other. But usage trends show that since the early 1960s, embed increasingly has been used with more frequently than imbed. Because of this, going with embed is your best bet.